Mechanical coded lock with password convenient to change

The utility model discloses a mechanical coded lock with the password convenient to change, and belongs to security articles. The mechanical coded lock can effectively solve the problem that because space is limited, a password can not be changed conveniently. The mechanical coded lock structurally comprises a lock body and a lock shaft. The lock body is provided with a number dialing wheel and a password changing wheel. The lock shaft is provided with a plurality of bosses with the same size. The password changing wheel is provided with a round insertion hole, and the outer surface of the password changing wheel is provided with wheel teeth. According to the mechanical coded lock, the password can be changed conveniently even in a place with limited space, so that space is saved and the application range is expanded.