The invention discloses an SCARA robot special for screw assembly. The SCARA robot comprises a tail end actuating mechanism, a wrist part, an elbow part, a shoulder part, a shoulder part lifting mechanism and a machine base. The tail end actuating mechanism comprises a screw retreating groove nozzle, a screwdriver, an end cover, a bottom cover and an electric drill tail end actuating mechanism lifting frame. The wrist part comprises a wrist part auxiliary plate, a wrist part composite bearing, a wrist part connecting cover, a wrist part main plate and wrist part reinforcing ribs. The elbow part comprises a first motor, a first motor connecting cover, an elbow part main plate, an elbow part composite bearing and an elbow part connecting cover. The shoulder part comprises a second motor connecting cover, a second motor, a shoulder part main plate, shoulder part reinforcing ribs, a shoulder part auxiliary plate, a shoulder part sliding plate, shoulder part sliding grooves and a threaded cover. The shoulder part lifting mechanism comprises a third motor, a third motor connecting cover, a third motor coupler, a lead screw, a shoulder part lifting mechanism main plate, sliding groove fixing rods, sliding grooves and the like. The machine base comprises a fourth motor, a machine base composite bearing, a machine base cylinder and a machine base bottom plate. The SCARA robot is novel in design, safe and reliable.