Non-negative pressure water supply system with passive self-cleaning function

The invention discloses a non-negative pressure water supply system with a passive self-cleaning function. The non-negative pressure water supply system with the passive self-cleaning function comprises an integrated water supply tank, and a pipeline connection system which is connected to a municipal water supply pipe network and a user water supply pipe network, wherein the municipal water supply pipe network and the user water supply pipe network constitute a water supply pipe network; the integrated water supply tank comprises a water storage tank; the water storage tank is provided with asidewise water inlet; water flowing into the water storage tank from the sidewise water inlet scours the inner wall surface of the water storage tank in the tangential direction; and a transition water tank is arranged inside the water storage tank, is connected to the municipal water supply pipe network and the user water supply pipe network through a water inlet pipeline and a water outlet pipeline, and is connected to