In order to solve the problem that low ash melting point Shenfu coal is difficult to be directly used in entrained-flow gasification, high ash melting point coal and low ash melting point Shenfu coal were mixed according to different mass ratios. The mineral composition of raw coal and coal ash ( 815℃ ) was analyzed by X-ray diffractometer ( XRD ). The change process of coal ash minerals at different temperatures was analyzed by FactSage 8.1 thermodynamic equilibrium calculation software, and the influence mechanism of coal blending on the melting temperature of Shenfu coal was discussed. The results show that the ash flow temperature of high ash melting point coal exceeds 1 500℃, and the ash flow temperature of Shenfu coal is 1 155℃. With the increase of blending ratio of high ash melting point coal, the ash flow temperature of blended coal shows a nonlinear upward trend, mainly due to the formation of mullite with high melting point at high temperature after coal blending. The research results can provide reference for improving the melting characteristics of Shenfu coal ash.