Objective To study the influence of sodium nitroprusside combined with silver sulfadiazine on deep Ⅱ degree burns on the rats skin wound healing.Methods 100 Wistar rats with deep second-degree burn wounds on the backs were divided into four groups,the saline group,1% sulfadiazine Cream group,1mmol / L sodium nitroprusside group and 1% sulfadiazine Cream +1 mmol /L sodium nitroprusside group.Each group has 25 rats.At different time,cell cycle,hydroxyproline content and healing,wound healing rate calculation of burn wounds tissue were observed.Results Burn wounds treated with Sulfadiazine Cream + SNP,the wounds healing were faster than the other groups.After 10d,sulfadiazine Cream + SNP group wound hydroxyproline content,the percentage of cells in S-phase peak was significantly higher than saline group(P0.01).Between sulfadiazine Cream group,and sodium nitroprusside group was no significant difference(P0.05).Conclusion Sulfadiazine combined with sodium nitroprusside can effectively promote deep Ⅱ degree burn wounds in rats healing.