Abstract: In order to improve the safe and efficient mining level of the mine and solve the problem of surrounding rock control in the end area of gob-side entry retaining technology, a complete set of mechanized equipment for gob-side entry retaining with flexible formwork was developed based on the engineering background of 42305 working face of Wanli No.1 Mine. The arc triangular suspended plate model is established, and the calculation formula of the side length of the arc triangular suspended plate is derived. It is shown that the side length of the suspended plate is mainly controlled by the factors such as roof lithology, thickness, overburden load and plate weight. Combined with the geological conditions of the working face, the side length of the hanging plate is calculated to be a=16.8m, and the ratio to the periodic weighting step L=14m is about 1.20, indicating that the arc triangular hanging plate and the arc triangular block formed by the 'O-X' fracture have a spatial overlap, thus forming a bearing 'large structure', and forming a stable cooperative bearing mechanism with the 'small structure' of the support system of the working space of the roadway. The numerical simulation shows that the end retaining equipment makes the maximum bending moment line of the roof shift to the goaf, and the vertical stress distribution and deformation characteristics of the end area provide a basis for equipment selection and arrangement and roadway support optimization. The research shows that the configuration of complete mechanized equipment for gob-side entry retaining in working face is reasonable, which provides safety guarantee for gob-side entry retaining operation.