The utility model discloses a slip casting system for aftertreatment of wall of a sunk well wall, including mud pit, slush pump, mud conveyer pipe and the device of pegging graft fast, the mud outputof mud pit with the mud input fluid turn -on connection of slush pump, the mud output of slush pump with the mud input fluid turn -on connection of mud conveyer pipe, the mud output of mud conveyer pipe with the mud input fluid turn -on connection of device fast pegs graft, the mud output of device and the setting just runs through the injected hole of wall of a sunk well inner wall and outer wallon wall of a sunk well mud input fluid turn -on connection fast peg graft, the liquid outlet setting of the mud output of injected hole is on wall of a sunk well's outer wall. The utility model discloses guarantee the wall of a well and transfer smoothly and reduce the wall caving phenomenon, not only can effectively guarantee the tunnelling speed of open caisson, can also reduce the stratum infiltration and erode what the well was helped, be favorable to guaranteeing the stability of well group.