Abstract: Flat loading test is an available method to determine the characteristic value of subsoil bearing capacity, and was nominated by standardization code. As its shortage of taking time and money, it was much more important for the testing data to be used sufficiently. By analyzing an engineering information, this thesis adopted ways and means, such as choosing different settlement value standard of pressure as bearing capacity, comparing the site test result to the lab etc. to solve the discrepancy of the flat loading test result and gain the index of bearing capacity. These methods seem disagreement to the standardization code, but accurately it was much more corresponding to the principle of the code. So it would have some reference effectiveness for other engineering.