The invention relates to a hard rock tunnel non-blasting digging blocking method and a construction method. According to the method, a hole drilling core taking technology is utilized, mutually engaged cutting peripheral holes are formed along a tunnel digging contour line, so that a hole wall-shaped digging free face is formed on the periphery of a tunnel face; a hydraulic splitting machine splitting technology is used, in addition, the characteristic that the tensile intensity and the shearing-resistant intensity of rock are much smaller than the pressure-resistant intensity is utilized, the tunnel face digging blocking is firstly carried out, in each digging block, the synchronous splitting digging splitting surfaces do not exceed two, in addition, the two splitting surfaces are in large-angle obtuse angle intersection, in addition, at least one digging free face vertical to the tunnel face is included, then, the digging construction sequence from the lower side to the upper side and from the periphery to the middle is adopted, and the smaller splitting force is used for carrying out rock pulling cracking and shearing cutting splitting digging on the tunnel face along the splitting surface. The hard rock tunnel non-blasting digging blocking method has the advantages that the adverse influence of vibration, noise and dust in the hard rock digging construction can be eliminated, and the utilization rate of tunnel hole slag as building stone materials can be improved.