Constant-temperature and constant-humidity medicine storage cabinet

The utility model relates to the technical field of medicine storage containers, in particular to a constant-temperature and constant-humidity medicine storage cabinet which comprises a main cabinet body, a temperature and humidity sensing controller, a centrifugal fan and an electric heating pipe. According to the constant-temperature and constant-humidity medicine storage cabinet, the top air guide flow channel, the top air inlet hole and the top negative pressure hole which are used for communicating the interior of the main cabinet body with the upper adjusting cavity are formed in the upper wall of the main cabinet body, and the opening and closing states of the top air inlet hole and the top negative pressure hole are automatically adjusted by turning over the cover plate switch; when the medicine storage cabinet is opened, external air is automatically pumped away, and the situation that the interior of the medicine storage cabinet is affected by the external air and humidity is avoided; a temperature