The utility model provides an experimental device for simulating migration of micro-plastics in soil, which comprises a drainage tank, a water inlet pipe and a water outlet pipe. The experimental assembly is arranged in the drainage tank, the experimental assembly comprises an experimental tube arranged in the drainage tank and quartz wool located at the bottom of the experimental tube, and the experimental tube is further used for bearing sandy soil located above the quartz wool and micro-plastic located above the sandy soil; injecting an experiment solution into the experiment tube from thetop of the experiment tube to simulate a migration path of the micro-plastic in the soil. The simulation of the migration of the micro-plastic in the soil is realized, so that experimenters can conveniently obtain experimental data of the migration of the micro-plastic in the soil, and a theoretical basis is provided for practical application. Meanwhile, the experimental device for simulating themigration of the micro-plastic in the soil is simple in structure, convenient for experimental operation, recyclable and low in cost.