Device for simulating longitudinal migration of dissolved organic matters in soil and use method of device

The invention discloses a device for simulating longitudinal migration of soil soluble organic matters and a use method of the device. The device comprises a workbench, a water storage tank, a leaching bracket, a peristaltic pump, a plurality of leaching pipes, a leaching collection mechanism and a lifting adjustment mechanism, the water storage tank is arranged on the workbench, the leaching collection mechanism is arranged below the workbench, the leaching support is arranged between the leaching collection mechanism and the lower end face of the workbench, and the leaching pipes are vertically arranged between the leaching collection mechanism and the lower end face of the workbench side by side and connected with the leaching support. The lifting adjusting mechanism is respectively connected with the leaching collecting mechanism and the leaching bracket and is used for driving the leaching bracket to drive the plurality of leaching pipes to lift below the workbench; the input end of the peristaltic pump