The utility model discloses a big angle down oblique jacking structure of plastic mould, including bottom plate, the jacking plate of arrangement in the top of bottom plate and the mould base of arrangement in the top of jacking plate, bottom plate and mould base between fixed connection have the pole of supporting, and the one end direction of pole of supporting to mould base is inclined to set, the first installation hole is set up on the jacking plate, and the both sides inner wall of first installation hole each fixed mounting is a first fixed block, the opposite side of two first fixed blocks each still set up has first guide slot, and first guide slot is set up to the other end direction of mould base and inclines upwards. The utility model discloses a pole of supporting guide movable seat, makes oblique jacking and moves out synchronous movement together with movable seat, after moving a distance, oblique jacking and move out the product buckle of separation, thereby satisfy such product's stripping and structure requirement.