Dangerous chemical substance overwater leakage diffusion analogue simulation test platform

The invention provides a hazardous chemical substance overwater leakage diffusion analogue simulation test platform which comprises an annular water tank and a water power unit, a wind power unit, a medium processing unit and a data acquisition unit which are arranged on the annular water tank, the annular water tank comprises a foundation and an observation part arranged at the upper end of the foundation, and an annular groove is formed in the upper end of the foundation; a medium processing unit is arranged on the periphery of the foundation, a water power unit is installed in the annular groove, a wind power unit is installed on the observation part, and a data acquisition unit is arranged outside or inside the observation part. According to the water leakage diffusion analogue simulation test platform for the hazardous chemical substances, the light hazardous chemical substances are driven by coupling of a hydrodynamic field and a wind field, physicochemical indexes of the hazardous chemical substances a