Engine complicated structure ring pipe positioning repairing method

The invention provides an engine complicated structure ring pipe positioning repairing method. Mutually buckled positioning clamping blocks are used to fix T-junctions and four-way joints on ring pipes; the buckling positions form a cylindrical through hole which is parallel to the plane where the ring pipes are positioned; when a positioning clamping block fixes a T-junction and a ring pipe, or fixes the four-way joint and the ring pipe, the ring pipe which is connected with one end of the T-junction or the four-way joint penetrates through the through hole, two side faces, perpendicular to the radial direction of the through hole, of the positioning clamping block abut against an axial end of the T-junction or the four-way joint, the side faces, parallel to the plane where the ring pipeis positioned, of the positioning clamping block press against the adjacent ring pipe, or humps are formed in the side faces, parallel to the plane where the ring pipe is positioned, of the positioning clamping block and an L