The invention relates to the technical field of the large steel structure manufacturing, and relates to an altitude large-span truss dip angle self-anchored accumulative sliding construction method. The technical scheme has a key point that the altitude large-span truss dip angle self-anchored accumulative sliding construction method comprises the following steps: mounting a track truss, and inclining the track truss; laying a sliding rack on the track truss; dividing an altitude pipe truss into multiple segments and splicing the segments, wherein the altitude pipe truss is constructed by adopting the segmental way, various segments of the altitude pipe truss are arranged on the sliding rail in order through sliding boots on a sliding support frame and the adjacent segments are orderly connected, various segments of the altitude pipe truss on the sliding track are stopped after sliding with a set distance from top to bottom, a steel cable hydraulic lifting device locks the steel strand, and the steel strand is connected with an anchoring point on the sliding support frame on the head segment of the altitude pipe truss, thereby preventing the altitude pipe truss from automatically sliding down along the sliding track under the effect of the own gravity, and improving the security performance of the altitude pipe truss in the construction process.