Multi-function pretreating machine before boiling cocoon

The utility model relates to a multifunctional pretreating machine before boiling cocoons. The tank of the pretreating machine is arranged on a frame through a speed reducer and a bearing seat; the frame is fixed with a rail; the rail is cooperated with the rotation of the tank; the tank makes a 360 DEG rotation along a central shaft. A cocoon drying bucket is connected with the tank to run synchronously from the initial position to the cocoon feeding position, and a tank cover is connected with the tank to run synchronously from the initial position to the position before discharging the cocoon. The frame is fixed with a pressure regulated tightener box cover sealed tank. The pretreating machine before boiling cocoons can complete the contacting steaming, the pressurization and the depressurization and the combined treatment, increase the reelability of the cocoons and reduce the reeling fold obviously.