Underground coal mine harmful gas monitoring and early warning device

The utility model provides an underground coal mine harmful gas monitoring and early warning device which comprises a main body, a protective shell connected to the outer side of the main body, a connecting spring fixedly connected between the protective shell and the main body, a mounting seat fixedly connected to the outer end of the main body, a monitoring box embedded in the main body, and a mounting frame fixedly connected to the outer end of the monitoring box. A first flow guide fan and a second flow guide fan are fixedly connected to the two sides of the monitoring box, a first early warning device and a second early warning device are embedded in the monitoring box, and a monitoring cavity is fixedly formed in the monitoring box. When the sealing layer is embedded into the monitoring cavity, the sealing effect of the sealing layer on the monitoring cavity is enhanced through the sealing strip, the top of the monitoring cavity is sealed through the sealing layer, leakage of gas to be detected is avoid