Fluidity tests and unconfined compressive strength tests were carried out to study the influence of mud content on the curing effect of sandy soil. Based on the response surface methodology, the relationship models of mud content with fluidity and unconfined compressive strength were established for mixed samples with a water cement ratio of 2:1, and the influential laws were analyzed. The results show that the mud content and other factors affect the fluidity and unconfined compressive strength. The model obtained by fitting the test results is significant, and there is a certain mud content, which makes the fluidity and strength both have peak values.