Through laboratory physical simulation and numerical simulation，enhanced oil recovery using weak gel flooding after cyclic steam stimulation was studied concerning high water cut and low recovery efficiency in heavy oil reservoir with edge and bottom water. The results of laboratory EOR research showed that compared with water flooding，the recovery of the steam stimulation was increased from 11.4% to 17.7% through oil viscosity reduction，and the recovery of the weak gelassisted steam stimulation may be increased by 18.3%. Optimal parameters were fixed after numerical simulation. The cyclic injection rate is 4 000 m3，the cyclic injection temperature is 280 ℃，and the slug size of injected gel is 0.06 PV. Based on the geological feature and exploitation characteristics of Nanpu35-2 oilfield，pilot test plan of weak gel flooding after cyclic steam stimulation was put forward. By the end of June 2014，11.2×104 m3 of weak gel was injected cumulatively and the cumulative oil production was 10.4×104 m3，and the recovery degree was predicted to increase by 2.6% in three pilot test well groups. The weak gel flooding is an effective development scheme after the cyclic steam stimulation in offshore heavy oil reservoir with edge and bottom water.