The utility model discloses relates to a device for replacing a clay ramming mechanism of a clay gun machine. The device comprises a movable trolley and a lifting device, wherein the lifting device is arranged below the movable trolley, and the lifting device is used for lifting the movable trolley so that the movable trolley contacts with the clay ramming mechanism; and the movable trolley is used for supporting the clay ramming mechanism when the clay ramming mechanism is replaced and driving the clay ramming mechanism to horizontally slide, so that the replacement of the clay ramming mechanism is realized. The device for replacing the clay ramming mechanism of the clay gun machine, which is provided by the utility model, can be used for improving the replacement efficiency of the clay ramming mechanism of the clay gun machine and shortening the replacement time of the clay ramming mechanism of the clay gun machine, so that the accidents of continuous single field discharge and blast furnace ventilation stop and reduction, which are caused by overlong replacement time in an on-line state, can be prevented; in addition, the device provided by the utility model can also be used for saving a large quantity of manpower and material resources.