Opening cover locking device

The utility model relates to an opening cover locking device which comprises at least two locks arranged in a cover, the adjacent locks are connected through a linkage mechanism, and at least one lockhole is formed in the opening cover. The lock comprises a lock seat, a driving piece, a swing arm, a sliding block, a support and a pressing head, the sliding block is installed in a sliding groove,one end of the swing arm is connected with the driving piece, the other end of the swing arm is hinged to one end of the sliding block through a connecting rod, and the support is bent. The end part of the shifting pin extends into the guide groove; a lock seat mounting hole connected with the inner surface of the opening cover is formed in the lock seat; the opening cover lock is simple in structure, convenient to install and maintain, small in size and light in weight, unlocking and locking linkage of all locks on the inner side of the opening cover can be controlled only by operating the lock at the position of one