The utility model discloses a grouting equipment belongs to railway existing line subgrade strengthening field to it is difficult to solve injected water mud molding control, and can not be at the assigned position to the reinforced (rfd) problem of road bed. This grouting equipment includes high -pressure grouter, still including geotechnique's bag, closing device, the closing device including seal tub, first flange, butterfly valve, second flange, the one end of sealing the pipe links to each other with geotechnique's bag, seals the other end of pipe and is connected with large flange, largeflange, first flange, butterfly valve, second flange are through connecting gradually with long screw. The utility model discloses make subgrade settlement and road bed disease obtain renovating, harm that maximum subgrade settlement of reducing and disease were brought.