As a kind of biomass energy, municipal sludge can make full use of the moisture and organic matter in the iron ore sintering process to realize the reduction, harmlessness and resource utilization of sludge. In this paper, sintering process is used to do collaborative accessing of municipal sludge in sintering process, and relevant experimental studies are carried out. The results show that, when the proportion of dry sludge in the sintering raw material is less than 10%, the shape of the compound does not change significantly during the heating to 1 300 °C, and with the increase of the proportion of dry sludge, the burning loss of the mixture increases, and the overall burning loss shows an upward trend, especially before 600 °C. With the increase of the proportion of dry sludge, the carbon content in the sintering material increases and the degree of iron Oxide reduction in the sinter deepens. When the proportion of dry sludge is less than 1%, the sinter strength increases significantly, and the strength of sinter begins to decrease after continuing to increase the proportion of dry sludge. The proportion of dry sludge is less than 1%, which has little effect on the overall composition of the sinter, while 30%~45% of S and 83% of P remain in the sinter after adulteration sludge, which is significantly higher than the residue after pure sludge combustion. Therefore, considering the composition requirements of steel mills for finished sinter, the proportion of dry sludge on collaborative accessing in the sintering process needs to be controlled below 1.5%.