To solve a problems that a factor showing a clear correlation between a soil environment and a corrosion characteristic of a steel product is not found, and a corrosion evaluation method in a laboratory level such as an acceleration test is not established.

In this soil corrosion test method of a steel product using simulated soil, the simulated soil is constituted of a granular material having properties of being insoluble to water, and hardly soluble to an acid and alkali, and a pF value is set at an optional value by adjusting a water content in the simulated soil.