Crawler-type walking device of tunnel excavation trolley

The utility model belongs to the technical field of crawler-type tunnel excavation trolleys, and particularly relates to a crawler-type traveling device of a tunnel excavation trolley, which comprises a trolley body. The bottom of the trolley body is fixedly connected with a pair of bearing plates; a crawler walking device is mounted below the bearing plate; a water storage tank is arranged at the top of the bearing plate; the side wall of the water storage tank is fixedly connected with a liquid conveying pipe; a plurality of groups of nozzles are fixedly connected to the middle of the liquid conveying pipe; the nozzles are obliquely arranged, the output end faces the surface of the crawler walking device, during working, spraying is conducted on the surface of the crawler walking device through the nozzles, then the surface of the crawler walking device is cleaned, and part of soil adhering to the surface of the crawler walking device and the interior of the clamping groove is cleaned away; hindrance of soi