Rapid biological reader with inward-contracted sealing cover

A rapid biological reader with a contracted sealing cover relates to the technical field of biological readers, and adopts the technical scheme that the rapid biological reader comprises a shell and a detection device arranged in the shell, the shell comprises a top plate, and further comprises a detection port and a sealing cover which are arranged on the top plate; a supporting frame is arranged on one side of the detection device, rotating arms are rotationally connected to the two sides of the supporting frame correspondingly, the rotating arms are provided with L-shaped extension rods, the two extension rods are hinged to the two sides of the sealing cover correspondingly, and torsional springs are further arranged between the extension rods and the sealing cover; the rotating arm is also provided with a driving device; a containing space used for containing the sealing cover is further arranged between the supporting frame and the top plate, and the containing space is communicated with the detection op