In order to optimize the optimal process parameters of steel slag blending into sintering, the properties of steel slag and sintering raw materials are analyzed; the effect of alkalinity, suction negative pressure, proportions of carbon and steel slag addition on sintering parameters and sinter quality is studied through sintering test, and the optimal steel slag ratio and sintering parameters are optimized by the response surface method. The results show that, under the Design Expert simulation, 4 factors with greater influence on the metallurgical performance of sinter are obtained through ANOVA, including sinter alkalinity, steel slag ratio, sintering negative pressure and fuel ratio from large to small, and the optimized sintering parameters are: alkalinity is 1.85, steel slag ratio is 7.5%, sintering negative pressure is 8.9 kPa, and carbon allocation is 3.8%. Under the simulated optimal conditions, the quality inspection of sinter is 77.2%, the low-temperature reduction chalkbality is 73.4%, the bowl strength is 71.6%, and the metallurgical quality of sinter meets the needs of blast furnace smelting.