China's Export Curbs on Tunnel Boring Machines: Why They Matter for India's Infrastructure and Border Roads
China has tightened export controls on tunnel boring machines (TBMs), the giant machines that dig tunnels, and on other specialised construction equipment. Exporters will need a licence from 18 November 2026.
The rules were issued jointly by China's Ministry of Commerce and the General Administration of Customs under its dual-use export rules (rules for goods with both civilian and military uses).
They cover shield and hard-rock TBMs, key parts such as cutterheads and main drives, walking excavators for rough terrain, and concrete-spraying machines built for tunnels at very high altitude.
Exports to "sensitive countries and regions that have disputes with China" need a government licence. Beijing has not named these countries, but India, with its disputed Himalayan border, is widely seen as a target.
India depends heavily on Chinese-made or Chinese-linked TBMs for metro lines, the Mumbai-Ahmedabad high-speed rail tunnel and strategic tunnels near the border. Officials say they are consulting industry and pushing for domestic manufacturing of such machines.
China's Export Control Law, 2020 and the Dual-Use Items Framework
China's Export Control Law (ECL) is the main Chinese law that decides which goods and technologies can leave China, and on what conditions. It came into force on 1 December 2020. It is backed by the Regulations on Export Control of Dual-Use Items, which came into force on 1 December 2024 and set out how licences, control lists and checks on end-users work. Using these rules, Beijing can make any listed item need a licence, and can refuse licences for chosen countries.
The TBM curbs are the newest use of China's dual-use export rules. Because the law lets Beijing pick "sensitive" destinations, it can slow India's tunnels without a formal ban, which is why experts see it as a trade-war risk.
Tunnel Boring Machine (TBM) Technology
A tunnel boring machine is a giant machine that digs a round tunnel and lines it with concrete at the same time. A rotating cutting wheel at the front grinds through rock or soil while the machine crawls forward, fitting concrete rings behind it. TBMs are faster and safer than blasting, and they disturb the ground and buildings above much less. That is why almost every modern metro, rail tunnel and long road tunnel uses them.
Since India does not yet make large TBMs at scale, a Chinese licence requirement could delay metros, the bullet train tunnel and Himalayan road and rail tunnels. This is why the news is pushing India to build its own TBM industry.
Border Roads Organisation (BRO)
The Border Roads Organisation, or BRO, is the Indian government body that builds and maintains roads, bridges, tunnels and airfields in the country's border areas. It works in some of the hardest places on earth: high Himalayan passes, deserts and thick north-eastern forests. Its work lets the Army move troops and supplies quickly and links remote border villages to the rest of India. Today it functions under the Ministry of Defence.
BRO's high-altitude tunnels and roads near the LAC need exactly the kind of tunnelling and concrete-spraying machines China now controls. If licences are refused or slowed, border tunnels and roads could face delays, which is why the news is seen as a strategic risk for India.
- China's TBM export controls announced 19 October 2026; in force 18 November 2026
- Issued by China's Ministry of Commerce with the General Administration of Customs, under the dual-use export framework
- Items: shield and hard-rock TBMs, cutterheads, main drives, walking excavators, high-altitude concrete-spraying machines
- Two tiers: licence for "sensitive" destinations with territorial disputes; registration for others
- China's Export Control Law in force since 1 December 2020; dual-use regulations since 1 December 2024
- Mumbai-Ahmedabad HSR: 21 km underground section, about 7 km under Thane Creek
- India's proposed manufacturing incentive: about US$1.2 billion, with TBMs among priority products