The pressure-dispersing anchor cable is a new type of single-hole composite anchorage system developed in recent years. Several unit cells are set in the same hole, each unit cell with different free length and anchor cable length. By the preliminary compensate tension, the concentration tensile of cable are divided into several small dispersive pressure with equal load value, which respectively acts on cable segment of each unit anchorage. With the engineering practice of slope treatment of K17+440~695 subgrade of 330 national highway, this paper discusses the construction technology of pressure dispersion pre-stressing cable and some key points which should be paid attention in the construction and engineering operation.