In mining technology of Kailuan Fangezhuang Mining Branch after every cycle coal cut of mining machine, simple steel pipe was used to support roof temporarily, with bolting machine making bolt and hanging net. During this process, workers are under unstable roadway roof, which easily causes roof accident. In order to solve this problem, mining self-moving type advanced support device was studied and applied, the device is composed by two support front and back, after every cycle, front support uses slewing beam to hang net to support exposed roof, back support moves the front one, workers can do anchor bolt working under protective front beam, the technology ensures the safe production.