Fuente: WIPO "circular economy" The utility model relates to the technical field of black fungus culture medium devices. The utility model particularly relates to a culture medium preparation auxiliary device for black fungus planting. The device comprises a base, an electronic scale and a stirring motor, an electronic scale is fixedly arranged on the base; the base is fixedly connected with a vertical upward stand column through a fixing piece. The stand column is sleeved with two sets of fixing devices. The fixing device positioned at the upper part is connected with a stirring motor with a vertically downward output shaft; the tail end is connected with a stirring rod; the fixing device located on the lower portion is fixedly connected with a hollow connecting piece. Wherein fixing clamps which are symmetrical left and right are rotatably connected into the hollow connecting piece, first fixing bolts which are symmetrical left and right are spirally connected to a shell of the hollow connecting piece in a penetrating mode, the fixing clamps jointly clamp a preparation container, the preparation container is placed on an electronic scale, and a stirring rod is moved into the preparation container by moving a fixing device above the stirring rod. According to the utility model, the preparation process is simplified, and the preparation efficiency is improved during batch preparation.