Preparation system for deep processing of meat

The preparation system comprises a processing machine body, and an extrusion moving mechanism is installed at the top position of one end of the processing machine body; and the extrusion moving mechanism comprises a discharging pipe, a water storage tank, a booster pump, a water outlet pipe, a connecting pipe, a connecting valve, an air bag, a guide pipe, a convergence cavity, a guide hole, a moving hole, a sliding plate, a placement hole, a storage hole, a connecting frame, a tensioning spring, a moving plate, a limiting plate, an extrusion plate, a clamping hole, a limiting rod and a water outlet valve. Water can be conveniently guided into the air bag and sprayed to the outer end of the connecting pipe from the guide hole through the air bag and the gathering cavity, so that a worker can conveniently sleeve the casing, the outer end of the casing can be conveniently extruded by an extrusion plate through a tensioning spring and a moving plate, and a sliding plate can be conveniently moved by matching with