Auxiliary frame lining withdrawing device

The invention discloses an auxiliary frame lining withdrawing device. The auxiliary frame lining withdrawing device comprises a supporting part, the supporting part is of a vertically-through cylindrical structure, and the top structure of the supporting part is matched with the bottom structure of an auxiliary frame lining pipe. The auxiliary frame lining withdrawing device further comprises a pressing part arranged over the supporting part, and the bottom structure of the pressing part is matched with the top structure of a lining. In the working state, the supporting part supports the bottom of the lining pipe, the pressing part abuts against the top of the lining, and the pressing part can move in the axial direction of the lining pipe so as to get close to the supporting part to pressthe lining out of the lining pipe, or get away from the supporting part. According to the auxiliary frame lining withdrawing device, the supporting part and the pressing part are arranged by profiling according to the struct