Multifunctional biological safety cabinet

The invention discloses a multifunctional biological safety cabinet. The multifunctional biological safety cabinet structurally comprises a safety cabinet main body, tempered glass boards, a controller, a cabinet body, a ventilator, an ultraviolet lamp, a storage battery, a support frame and a fixing frame, wherein the support frame is convex, the surfaces of two sides of the support frame are equal, the top and the center are protruded, the surface of the top is movably connected with the edge of the surface of the bottom of the cabinet body in a cooperative welding manner so as to form a transverse H shape, and the length of the bottom of the support frame is 50cm. The multifunctional biological safety cabinet is provided with the ventilator, an adjusting rod is pulled to control a lifter to swing to drive a rotating device to control the ventilation size of a vent hole, air in the safety cabinet main body is circulated through the vent hole, and meanwhile, air exhausted from the safety cabinet main body is