Aimed at the problems of practical teaching system of distinctively-installed specialty,the rebuilding of practical teaching system used the OBE(Outcome based education)idea and the operation of practical teaching system used the PDCA (plan-do-check-act)idea had been proposed. Taken the city underground space engineering specialty,the reverse design flow path of rebuilding for practical teaching system based on OBE had been explained in detail and the operation process of practical teaching system based on PDCA had been analyzed. The practice of our school shows the rebuilding and operation of practical teaching system based on OBE-PDCA idea has made significant progress. The experience of our specialty can provide reference for practical teaching of distinctively-installed specialty.