Modularized constructed wetland pilot plant and use method thereof

The invention discloses a modularized constructed wetland pilot plant test device and a use method thereof.The modularized constructed wetland pilot plant test device comprises a main treatment unit, a pretreatment unit matched with the main treatment unit, a backwashing system, a power supply system and a filler and sampling system, modular design is adopted for filler, and unit bodies which can be conveniently replaced and installed and are provided with water quality monitoring ports are designed; the bed body is formed by splicing more than two groups of unit bodies, a dam is arranged in the middle of the bed body, water can enter and exit from the upper part and the lower part of the two ends of the bed body, and the up-and-down flow direction of water flow in the unit bodies can be adjusted by changing the opening and closing of the water inlet and outlet and the dam water-permeable holes, so that a backwashing effect is achieved; a heat exchange pipe and an aeration device are laid below the unit body, power is supplied through a solar panel and a mains supply, the bottom of a monitoring opening is directly communicated with a sludge discharge pipe, and sludge and gravel falling from the upper portion are discharged. The device has the monitoring, flushing and heating functions and has the characteristics of greenness, sustainability, convenience in replacement and maintenance and the like, and the operation cost is reduced.