Abstract: Most heavy oil reservoir already came into high cycle steam stimulation phase, exploitation effect is becoming weaker, we need optimize injection parameters of later cycle in order to improve exploitation effect. At present, some optimization software of injection parameters need too many parameters and is very complex, those made it difficult to use. Based on theories of injection parameters optimization about steam stimulation, developed a software, taking cycle net oil yield as target, we optimized injection production parameters in different recovery percent of reserves and different water deposit, and have made a chart. Workers in oilfield can easily get injection production parameters with the aid of the chart, and exploitation effect can be greatly enhanced. Applications indicated that optimum injection parameters getting from the chart can meet the accuracy of work, compared with parameters getting from optimization software, relative error not more than 10 per.