Abstract: To solve the difficulty of top-coal and coal wall falling,bottom slipping,supports toppling and biting of the "three soft" steeply inclined seam fully-mechanized mining working face,with the engineering background of Du jiacun 1201 working face,the study such as the location control of open-off-cut,the stability of surrounding rock control,corollary equipment and construction technology are did.Through the above study,we get the effective measures to control the stability of working face.The measures finally make successfully mining in 1201working face,and we receive good society and economy benefits.