Mechanical locking device for spider crane supporting leg

The utility model relates to the technical field of engineering machinery, and discloses a spider crane supporting leg mechanical locking device which comprises a locking mechanism, an adjusting mechanism and a base mechanism, the adjusting mechanism is located at the rear end of the locking mechanism, and the base mechanism is located at the lower end of the adjusting mechanism. The locking mechanism comprises a mounting plate, a rotating groove, a rotating block, a fixing block, a fixing rod, an anti-skid handle, a fixing plate, a through hole, a limiting spring and a fixing pin, the rotating groove is formed in the mounting plate, the lower end of the rotating block is rotationally connected with the rotating groove, and the rear end of the fixing block is fixedly connected with the front end of the rotating block; the left side of the fixing rod is fixedly connected with the right side of the fixing block, the left side of the anti-skid handle is fixedly connected with the right side of the fixing rod, th