This automatic plastic screw cap capping machine is applied to plastic screw cap (common PCO neck mineral water bottle cap, detergent bottle cap, cream or gel bottle cap, special top flip cap, sports cap), plastic bottle, PET bottle and glass bottle, the capping heads adopt magnet force twisting, it can release the overload force, it can ensure the tightness and at same time no scratch and harm and damage to the cap it self. It can be with the cap sorting and cap sterilizing system.