Plant pathogenic microorganism preservation test tube

The utility model relates to the technical field of microorganism preservation, in particular to a plant pathogenic microorganism preservation test tube which comprises a tube body, a sealing plug is arranged at the top end in the tube body, a handle is fixed on the upper side of the sealing plug, a screw rod is arranged in the sealing plug, and the plant pathogenic microorganism preservation test tube further comprises an anti-falling mechanism and an anti-falling mechanism, the anti-falling mechanism is arranged in the pipe body; the anti-falling mechanism comprises a sleeve fixed to the lower side of the sealing plug and a moving block rotationally connected to the outer portion of the screw rod through threads, and a rotating disc is fixed to the upper side of the screw rod. The two extrusion plates are driven to extrude the inner wall of the pipe body under the elastic action of the four springs, the sealing plug is prevented from sliding along the inner wall of the pipe body, external air is prevented f