Constant pressure device of water treatment system

The utility model provides a constant pressure device of a water treatment system, which comprises a surge tank, a water inlet pipe arranged on the surge tank, a vacuum suppressor, a first pressure gauge and an exhaust pipe arranged at the top of the surge tank, a surge tank water outlet pipe arranged at the bottom of the surge tank, and a water distribution pipe transversely arranged at a water outlet of the surge tank water outlet pipe, a plurality of water pumps which are arranged side by side at intervals are installed on the front side of the water distribution pipe, each water pump is independently communicated with the water distribution pipe through a pipeline, the water supply main pipe is installed on the front side of the water pumps which are arranged side by side at intervals, and a water outlet of each water pump is independently connected with the water supply main pipe through a pipeline. And an independent check valve is mounted on a pipeline for connecting each water pump with the water supp