Abstract: Aiming at the evaluation of grouting reinforcement effect and water inrush danger after grouting on floor in 14030 working face, the "27381 Grouting and Water Control System" was used to evaluate it. Results showed that the L2 aquifer and its guiding zone has less dangerous to water inrush risk because they are farther from the working face and its water-rich medium. The L8 aquifer has medium dangerous to water inrush risk because it is close to the working face and its water-rich strong. There is no unimpeded hydraulic connection between L2 and L8. Severely dangerous zones are affected by faults. The types of water-rich in the severe danger zones of I, II and V are J-type, the risk of water inrush is low; and severe danger zones of the III, IV and VI are U-type, the risk of water inrush is medium. The results of the three-parameter evaluation of the grouting effect in the severely dangerous zones are good. The grouting process of the working face has experienced the initial increase—smooth grouting—interacting—the final stage of the final pressure stabilization. The normal zone grouting amount is 0.012t/m3, the fault zone is 0.220t/m3, and the grouting coefficient is 18.3. The working face grouting effect comprehensive evaluation is good, and the water inrush is lower.