The utility model relates to a backstroke crusher's appurtenance especially relates to a side plate hoist device, including the gallows, there is the lewis hole on the gallows, there is the U -shaped clamping part below of gallows, open side down for the U -shaped clamping part, the U -shaped clamping part is equipped with the centre gripping hole, there is guider in the outside in one of them centre gripping hole, guider is inside hollow tubular structure, guider's internal diameter size is the same with the centre gripping hole size, guider perpendicular to clamping part and with concentric setting the in centre gripping hole, be equipped with the guide way on guider's the lateral wall, the extending direction of guide way is unanimous with guider, and the length of guide way is less than guider's length, be equipped with the fitting pin in the guide way, the fitting pin inserts in guider, the fitting pin remove in guider and the penetrable clamping part on the centre gripping hole, be equipped with the locating lever on the fitting pin, locating lever perpendicular to fitting pin lies in guider's outside, the utility model discloses the structure, convenient operation, the time spent is short.