Abstract: Cyclic waterflooding is an effective hydrodynamic method to improve oilfield development effects. Cyclic waterflooding experimental results and development characteristics are analyzed in conjuncton with the geological features of IV 4 series of strata in Shuanghe oilfield. Five wells are put into field experiment with the maximum incremental unit daily output of 21t and the minimum total water cut decrease of 2 percentage. The annual output of the affected producers corresponding with cyclic water injectors is 6027t higher than that of conventional waterflooding and annual water Cut increasing ratio is 1 percentage lower than that before experiment.