The utility model relates to the technical field of automobile parts, and discloses a vehicle storage box lock mechanism, which comprises a gland (1), a button (2), a lock connecting rod (3), a rotating arm (4), a spring (5), an outer door (6) and a storage box, the storage box is provided with a lock opening, the outer door (6) is provided with a tongue opening (61) and is hinged with the storage box, the lock connecting rod (3) is provided with a step, the end part of the lock connecting rod (3) is a lock tongue corresponding to the lock opening of the storage box, and the rotating arm (4) is provided with a spring (5). The storage box lock mechanism for the vehicle is scientific in design, simple and compact in structure, convenient to install and use, safe and reliable in function, ideal in effect, cost-saving and durable.