The invention relates to a pulse flushing device for pipelines, in particular to a spring type pulse flushing device for pipelines, which solves the problems that existing pipeline flushing methods are poor in effect but high in energy consumption. A rubber seal ring is embedded on the inner wall of a water inlet end of a pipe, a piston disposed inside the pipe is hermetically connected with the rubber seal ring, a center shaft is penetratingly mounted on the piston along the length direction of the pipe, a spring is sleeved on the center shaft, an end cap is arranged at one end of a spring protecting sleeve, the end cap and the spring protecting sleeve are mounted integrally, the spring is disposed in the spring protecting sleeve, an annular groove is machined at the upper edge of the piston axially, the other end of the spring protecting sleeve is inserted in the annular groove of the piston, one end of the spring contacts with the inner wall of the end cap, the other end of the spring contacts with the piston, and a limit plate is fixedly mounted on the outer wall of the end cap. The spring type pulse flushing device for pipelines is used for flushing away impurities on the inner wall of water delivery pipelines.