Abstract: The numerical simulation experiment of stress field and damage field for 110 working face under mining situation in a mine was carried out by using numerical simulation software of ANSYS.The experiment results show that there is a pressure peak value zone in front of the coal wall about 15 m, so coal body is broken fully in the zone with working face advancing; broken depth of immediate roof for the first time is about 30 m, immediate roof will be broken after about every 10 m, it can determine the distance of first weighting and periodic weighting; the depth broken of main roof occurs in the rear of the goaf for periodic damage and touch gangue but not nearby the coal wall.