The invention discloses a pipe network pressure-superposed secondary water supply control system. The pipe network pressure-superposed secondary water supply control system mainly comprises a control cabinet, a pressure sensor P1, a flow sensor Q1, a no-negative-pressure controller, a pressure sensor P0, a flow sensor Q2, a pressure sensor P2, water pumps and a pneumatic water tank, wherein the control cabinet integrates a cabinet body, a control panel, a monitoring module, a touch screen and a controller; the pressure sensor P1 and the flow sensor Q1 are mounted on a water inlet pipe; the no-negative-pressure controller and the pressure sensor P0 are mounted on a steady-flow tank; the flow sensor Q2 and the pressure sensor P2 are mounted on a water outlet pipe; the controller is arranged in the cabinet body; a cabinet door and a cabinet lock, as well as the control panel, are mounted on the cabinet body in a matched manner; the touch screen is mounted on the control panel; and a voice alarming device, a power supply indicator, a fault indicator and a hand-operated/automatic intercutting switch are further arranged on the control panel. The pipe network pressure-superposed secondary water supply control system has the benefits that a no-negative-pressure pipe network pressure-superposed frequency conversion and speed regulation control function is achieved, the configuration is complete, the regulation and control are advanced and reasonable, the using effect is good, the protection functions are complete, intelligent unattended control can be realized, and an excellent popularization and application prospect is achieved.