Abstract: This paper puts forward the methods of calculating modulus of subgrade reaction, based on static loading test which contains full load segments, incomplete, irregular, or lack of clear ultimate load curves. According to static load tests instance in 4 project testing in African continent, the modulus of subgrade reaction on silty sand soil, gravelly soil, testing result based on static loading test is higher than curve fitting, and lower than existing literature. The modulus of subgrade reaction has bigger influence on infrastructure character analysis, get modulus of subgrade reaction from static loading test was important in the actual projects.