The invention discloses a medical instrument cabinet. The medical instrument cabinet comprises a cabinet door, a cabinet body, a partition plate, sliding grooves, drying devices, exhaust fans, ultraviolet lamps, a ventilating window, a pressure sensor and a controller, wherein a top plate and a bottom plate of the cabinet body are of a dual-layer structure, a ventilation hole is formed in the inner layer, the drying devices and the exhaust fans are installed in an interlayer, the ultraviolet lamps are installed on the inner layer of the top plate of the cabinet body, the sliding grooves are formed in the side wall of the cabinet body, the partition plate is fixed through the sliding grooves, the ventilating window is arranged on the side wall of the cabinet body, and is hinged to the sidewall of the cabinet body, an electromagnet is fixed on the ventilating window, and is connected with one end of a spring, the other end of the spring is connected with an electromagnet arranged on theside wall of the cabinet body, the pressure sensor is arranged on a contact face when the cabinet body and the cabinet door are closed, and the drying devices, the exhaust fans, the ultraviolet lamps, the electromagnets and the pressure sensor are connected with the controller. According to the medical instrument cabinet, automatic sterilization of medical instruments is achieved, and the labor waste problem brought by sterilization is solved.