Abstract: In order to study the method of immediate inspection on the effect of pre-grouting engineering of 4-2 coal burnt rock curtain in Zhangjiaomao Coal Mine, this paper evaluates the existing single hole grouting end standard, and analyzes the influence of curtain grouting on the curtain belt and burnt area. According to the characteristics of fracture development and curtain engineering, it is proposed to examine the variation of the injected medium and the difference of hydrogeological units inside and outside the curtain from two aspects of one band and two zones. . The variation of injected medium can be analyzed by drilling and grouting feedback, and the difference of hydrogeological units inside and outside the curtain can be compared by the variation of water level and spring flow inside and outside the curtain. Engineering practice proves that the above instant inspection methods are considered. The road is correct and the conclusion is reliable.