The invention discloses an integrated construction method of blasting, hole sealing and grouting. The method comprises the following steps of S1, drilling a blasting and grouting hole; S2, placing a PVC pipe in the blasting and grouting hole; S3, loading a plurality of explosive packs in the lower section, wherein all the explosive packs are arranged in the length direction of the lower section atintervals; S4, conducting blasting; S5, after blasting, grouting the upper section of the PVC pipe, wherein slurry permeates into the stratum through through holes in the pipe wall of the upper section under the effect of pressure to reinforce the stratum. By means of the method, integrated construction of blasting, hole sealing and grouting can be achieved, the coherent process is achieved, andthe method helps to shorten the construction period and reduce the labor cost.