Four-axis moving platform and full-automatic screw locking machine

The utility model relates to a four-axis moving platform and a full-automatic screw locking machine which are more compact in structure. A portal frame is arranged at the upper end of a rack, and a first electric sliding table is transversely installed on the front face of a cross beam in the portal frame. A second electric sliding table is vertically mounted on the outer side face of a sliding block in the first electric sliding table through a connecting piece, a mounting plate is arranged on the outer side face of a sliding block in the second electric sliding table, multiple sets of mounting holes are formed in the mounting plate and penetrate through the front face and the back face of the mounting plate, and the multiple sets of mounting holes are distributed in an up-down structure; a third electric sliding table is longitudinally installed on the upper end face of the rack, and the center line of a ball screw in the third electric sliding table is perpendicular to the front face of the portal frame. T