Modified atmosphere fresh-keeping pretreatment device for edible mushrooms

A plurality of drainage pipes are arranged on the front end face of a rinsing tank, a plurality of stirring shafts are transversely and rotationally arranged at the lower end of the interior of the rinsing tank in a penetrating mode, stirring rods are arranged on the outer surfaces of the stirring shafts, and the stirring shafts are externally connected with a rotating motor; the rotary machining equipment is located at an opening in the upper end of the rinsing tank, the two vertical rods are symmetrically arranged, a connecting shaft is arranged in the center of the outer side face of each vertical rod, and the outer end of each connecting shaft rotationally penetrates through the outer portion of the rinsing tank and is connected with an L-shaped rocker; the two storage pieces are located between the two vertical rods respectively, clamping grooves are formed in the inner sides of the upper surfaces of the connecting blocks, electromagnets a are arranged in the clamping grooves, the connecting cross rod is