System and method for testing migration and obstruction of non-aqueous phase liquid pollutants in underground water

The invention provides a system for testing migration and obstruction of non-aqueous phase liquid pollutants in underground water. The system comprises a test soil sample chamber, a uniform variable speed sewage supply module, a water supply module and a solution collection module, wherein the test soil sample chamber at least comprises a first sand tank, a second sand tank and an engineering barrier isolation tank which are arranged in sequence and provided with a water permeable structure therebetween; and the uniform variable speed sewage supply module is communicated with the first sand tank, the water supply module is communicated with the bottom end of the first sand tank, and the solution collection module is arranged at the bottom ends of the engineering barrier isolation tank andthe second sand tank. According to the scheme, the migration and diffusion of non-aqueous phase liquid pollutants in the stratum can be simulated according to different geological conditions and different working conditions o