Because the steam stimulation of heavy oil reservoir belongs to the blowdown depleted development，the reservoir energy can not effectively maintain the supply of liquid and the recovery effect gets worse at later stage of the steam stimulation. Steam overlapping is serious and vertical oil sweep factor is low. Injecting steam with some gas or chemicals to assist the steam stimulation can effectively improve mobility ratio and the development effect of the heavy oil reservoir. The indoor single tube experiment studied the effect of different assisted methods on the steam drive. The results of the experiment showed that the displacement efficiency of flue gas foam assisted steam stimulation could be increased by19% compared with that of the steam stimulation. Based on these results of physical simulation experiment，numerical simulation methods were used to compare the different influences of different assisted methods on the steam stimulation effect. The results accorded with the results of physical simulation experiments. The recovery effect of flue gas foam assisted steam stimulation was the best considering many kinds of factors followed by nitrogen foam. When the formation heterogeneity was very poor and the oil viscosity was very high，the recovery effect of flue gas foam assisted steam stimulation could be more obvious.