The utility model discloses a high -efficient mould internal taping machine, its structure includes drives actuating cylinder, main drive band pulley, from the driven pulleys, belt line, adaptor, fixed mould, tapping mechanism, tapping chuck and work platform, the top of driving actuating cylinder is equipped with the adaptor, the top of adaptor is equipped with work platform, work platform's topis equipped with the main drive band pulley, the right side of main drive band pulley is equipped with from the driven pulleys, be equipped with the belt line between main drive band pulley and the from the driven pulleys, from the driven pulleys's rear portion is equipped with fixed mould, the inboard of fixed mould is equipped with tapping mechanism, from the driven pulleys's right side distributes and has tapping chuck, work platform's both sides distribute and have the through -hole, work platform's right side distributes and has U type connecting plate. This high -efficient mould internaltaping machine through setting up main drive band pulley and from the driven pulleys, can start main drive band pulley drive from the driven pulleys and rotate, carries out tapping machine work again, and operation process's is efficient.