In order to improve the stress concentration in the working face of the isolated island, the FLAC3D numerical simulation analysis of the working face of the isolated island was carried out by taking the 14-1102 working face of Zhengli coal industry as the research object. By the analysis results showed that when the form after the island coal face, gob side formed relatively obvious stress concentration phenomenon, the results showed that the isolated island coal face, after the formation of mined-out area adjacent to the working face near produces stress concentration phenomenon; By simulating the coal pillar left in the working face along the empty roadway, it can be obtained that the minimum coal pillar width satisfying the stability of roadway was 7 m. With the continuous advancement of the working surface, the maximum value of the leading bearing pressure presents a trend of first increasing and then decreasing. According to the simulation results, the mining support scheme of the working face was optimized. It can be seen from the engineering test that the roadway stability was relatively high after the adoption of the new scheme, which can meet the mining requirements of the working face of the isolated island.