Expanding culture tank for inoculation of morchella liquid strain

The utility model discloses an expanding culture tank for inoculating a morchella liquid strain. The expanding culture tank comprises a tank body, a top cover, a feeding pipe and a discharging pipe, a gas purification device is arranged on the top cover; a refining device is arranged in the tank body; the material uniformizing device comprises a movable driving assembly, a sliding block, a telescopic net, a telescopic rod and a connecting block. The movable driving assembly drives the sliding block to move up and down in the tank body; one end of the telescopic rod is hinged to the sliding block; the other end of the telescopic rod is hinged to the connecting block; the multiple telescopic rods are arranged on the circumferential face of the sliding block at intervals. The adjacent telescopic rods are connected through a telescopic net. The expanding culture tank has the beneficial effects that the problems that materials are easy to settle at the bottom of the tank body in the using process of the existing e