Mud jacking device of fish ball forming machine

The utility model relates to a mud jacking device of a fish ball forming machine. The device comprises a machine body, a grout inlet pipeline and a grouting piston, the grout inlet pipeline is arranged on the outer side of the machine body and provided with a piston installation opening, the grouting piston stretches into the grout inlet pipeline from the piston installation opening, the piston installation opening faces the outer side of the machine body, an outer swing arm is arranged on the outer side of the piston installation opening, one end of the outer swing arm is installed on the machine body through a rotating shaft, and the other end of the outer swing arm is connected to the grouting piston. An inner swing arm is arranged in the machine body, one end of the inner swing arm isconnected to the rotating shaft and synchronously swings with the outer swing arm through the rotating shaft, and the other end is connected with a driving mechanism for driving the inner swing arm toswing back and forth. The