The utility model discloses a coaxiality structure of a coaxial radial perforator. The coaxiality structure comprises a support frame, perforating charge mounting grooves are coaxially and radially arranged on the support frame, a detonating fuse penetrating hole is arranged along the axial direction of the center axis of the support frame, the support frame comprises an outer support frame and an inner support frame arranged in the outer support frame, and the outer support frame and the inner support frame are arranged coaxially. The coaxiality structure has the advantages that a plurality of coaxial radial perforating charges can be uniformly distributed on an axial surface in a perforating gun, a plurality of fluid channels can be formed on a plane on the same layer of the same well at one step, and the coaxiality of coaxial radial perforation assembly is guaranteed.