China has accelerated submarine production so sharply that analysts now argue Beijing is launching nuclear submarines faster than the United States. A recent assessment based on shipyard satellite imagery says this surge is centered on Bohai Shipbuilding’s Huludao yard in northern China, where major expansion has enabled a steadier flow of new ballistic missile submarines and nuclear attack submarines. The core danger for Washington is not that China has already matched American undersea dominance, but that sustained mass production could shrink a US advantage that has shaped naval planning for decades.
Over the past five years, China’s submarine construction has moved from occasional additions to a consistent output line. The International Institute for Strategic Studies reports that from 2021 to 2025 China launched 10 submarines compared with seven for the United States, and China’s launches totaled 79,000 tons compared with 55,500 tons for the US Navy.
That marks a sharp reversal from 2016 to 2020, when China added only three submarines totaling 23,000 tons while the United States launched seven totaling 55,500 tons. These are launch counts, not necessarily commissioned and active boats, but they show the pace of hulls entering the pipeline.
To sustain that tempo, Beijing has significantly expanded the Huludao shipyard. The new halls, rail slots, and supporting infrastructure are designed for repeatable production, not one off builds.
Which Submarines?
China’s buildup includes both nuclear ballistic missile submarines and nuclear attack type submarines, along with a large conventionally powered fleet that remains a major part of its regional sea denial strategy.
Type 094 ballistic missile submarines
Two Type 094 ballistic missile submarines were highlighted as recent launches from Huludao. These boats carry nuclear armed ballistic missiles and strengthen China’s sea based leg of its nuclear triad.
Type 096 next generation ballistic missile submarine
The Type 096 is expected to begin production this decade and could enter service in the late 2020s or early 2030s. It is widely expected to feature improvements in stealth, survivability, and missile reach compared to earlier Chinese SSBNs.
New guided missile and attack submarines with vertical launch systems
China’s recent launch numbers include at least six guided missile submarine hulls that incorporate vertical launch systems. These VLS cells could be used to fire high speed anti ship missiles, including missiles China displayed publicly at a Victory Day parade in Beijing.
Separately reported assessments of China’s newest nuclear attack designs describe a newer SSN variant equipped with pumpjet propulsion and a vertical launch system estimated around 24 cells, intended to support anti ship and land attack missions and to increase the threat to surface forces.
China Still Trails the United States in Undersea Power
Even with faster launches, the active nuclear submarine balance still favors Washington.
As of early 2025, China was assessed to have 12 active nuclear powered submarines, split between six ballistic missile submarines and six guided missile or attack submarines. The United States was assessed to have 65 total submarines, including 14 ballistic missile boats.
China also maintains a large conventionally powered submarine fleet, assessed at 46 boats. The United States has zero conventionally powered submarines, relying entirely on nuclear propulsion.
Technology and stealth remain the decisive gap. Analysts assess that Chinese designs lag behind US and European boats in overall quality, and the newest Chinese submarines are not believed to be as quiet as US submarines. In undersea warfare, quietness is often the difference between striking first and being found first.
The Advantages the United States Still Holds
The United States maintains several key edges that China’s production surge has not erased.
- A much larger nuclear submarine force with deeper operational depth and deployment capacity.
- A major acoustic advantage because US submarines are assessed to be quieter and harder to track.
- More mature undersea doctrine and experience built on decades of high end submarine operations.
- A stronger SSBN force with 14 ballistic missile submarines forming the backbone of US second strike capability.
- A more favorable operating environment with deep ocean approaches on both coasts, compared with China’s more constrained, chokepoint dependent geography.
Chinese Submarine Threat
China does not need to be better in every category to create serious problems for the US.
Numbers and production momentum
A larger fleet can impose constant pressure, complicate tracking, and force an opponent to spread limited anti submarine resources. Even if Chinese boats are individually inferior, a rising quantity can change operational math.
Quiet conventional submarines near Taiwan
China’s diesel electric submarines, including boats with air independent propulsion, can be well suited for ambush operations in littoral waters and chokepoints. In the first island chain, endurance matters less and quietness matters more.
Growing sensor networks and coastal defense
China has worked for years on layered undersea sensing in areas close to home waters. If those networks mature, they could raise risks for US submarines operating close to the Chinese coastline.
How the Building Spree Could Cut Into the US Advantage
Washington’s challenge is not only China’s surge but American production strain.
A Congressional Research Service report says the US Navy has fallen behind its goal of producing two Virginia class submarines per year, delivering only about 1.1 to 1.2 annually since 2022. At the same time, the Columbia class ballistic missile submarine program is at least a year behind schedule, with the lead boat not expected to be delivered until 2028.
The CRS also projects a near term dip in US attack submarine inventory, with the force expected to hit a “bottom of the valley” of 47 attack submarines in 2030 as older Los Angeles class boats retire. A return to 50 attack submarines is not expected until 2032 if construction goals are met. It warns this could mean heightened operational strain and weakened conventional deterrence.
As Navy Secretary John Phelan put it bluntly in congressional testimony, “All of our programs are a mess.” He added, “I think our best one is six months late and 57% over budget. That is the best one.”
Chinese Weaknesses
Even if China adds hulls quickly, several limitations still shape wartime performance.
- Acoustic inferiority means Chinese boats are more likely to be detected first.
- Less experience with long range, high risk patrols limits reliable blue water operations under pressure.
- Geographic constraints force Chinese submarines through chokepoints such as the Bashi Channel to reach the broader Pacific.
- American and allied anti submarine strength is assessed to remain a severe obstacle, especially in deeper waters away from China’s dense coastal defenses.
Submarines Against Taiwan?
A Taiwan conflict would likely push China to use submarines for sea denial and intimidation rather than decisive blue water duels.
Ambush operations in constrained waters could target amphibious ships, logistics vessels, and escort forces.
Threatening carrier strike groups with cruise missiles and torpedoes could force US surface forces to operate farther from the battlespace.
Defensive undersea zones near China’s coastline could complicate US submarine operations, especially if Chinese sensors and air assets can fuse tracking data quickly.
In a broader strategic sense, a more survivable Chinese ballistic missile submarine force could add pressure during a crisis by expanding China’s second strike credibility and increasing escalation risks.
Use in the Arctic
The Arctic angle centers on the possibility of next generation Chinese ballistic missile submarines operating farther north, potentially with Russian access.
Some assessments suggest future Chinese SSBNs may pursue longer range patrols and could be designed with features that support operations in colder northern waters. The strategic attraction is that a northern patrol area offers efficient ballistic missile trajectories toward North America and avoids Indo Pacific chokepoints. If China could sustain even occasional northern SSBN presence, it could force the US to divide anti submarine resources across theaters.
China’s submarine story is not primarily a story of immediate technical parity. It is a story of industrial acceleration.
US submarines are still assessed to be quieter, more capable, and backed by deeper operational experience. But China is building fast, expanding facilities to sustain that pace, and pursuing new designs with vertical launch systems and improved propulsion. If American submarine production remains stuck near about one hull per year while China continues its launch rhythm, Washington’s margin under the waves could narrow faster than planners want to admit.
ACZ Editor: In the case of an attack on Taiwan, a submarine advantage negates a lot of surface level navy by the enemy. But if China can muster a matching submarine fleet, even if it is slightly inferior in some particulars, our advantage there is not so great.