Hazardous substance regular detection device

The hazardous substance regular detection device comprises a cabinet body, a groove is formed in the top of the cabinet body, a dust concentration detector, a timing switch and an audible and visual alarm are sequentially installed on the inner side of the groove, the output end of the dust concentration detector is connected with a control host, and the dust concentration detector and the control host are controlled by the timing switch. The output end of the control host is in signal connection with the signal input end of the data platform, cover plates are symmetrically installed at a top opening of the groove through hinges, a plurality of linear holes are formed in the surfaces of the cover plates at equal intervals, finger grooves are formed in the edges of the upper surfaces of the cover plates, bosses are symmetrically arranged in the middle of the inner wall of the groove, and the bosses are arranged in the grooves. According to the utility model, the cover plate is abutted against the boss, so that