Engineering machinery door lock

The engineering machinery door lock comprises a lock body and a lock catch (2) which are matched for use, the lock body comprises a plate-shaped installation support (3), a primary lock connecting rod mechanism (4), a secondary lock connecting rod mechanism (5), a spring bolt assembly (6) and an opening mechanism (7). The engineering machinery door lock has a secondary locking function, can meet the use requirements of engineering machinery, is reasonable in structure, good in reliability, convenient to operate and smooth to open, and meanwhile, when the engineering machinery door lock is adopted, the lock catch extends less relative to a door frame, and the safety is improved. Therefore, the problem that in the prior art, clothes are scratched or scratched when people go in and out due to the fact that the lock catch protrudes out of the door frame too much is solved, and the safety of the door lock is improved. 本发明的工程机械门锁，包括配套使用的锁体和锁扣(2)；所述锁体包括板状安装支架(3)、一次锁连杆机构(4)、二次锁连杆机构(5)、锁舌组件(6)和开启机构(7)。该工程机械门锁具有二次锁定功能，