The utility model provides a water injection well augmented injection device, including sled seat and install generator on the sled seat, go up liquid centrifugal pump, inverter motor, acid jar, waterpitcher, gear motor and plunger pump, generator output terminal links to each other with the inverter motor input, and the inverter motor output links to each other with the gear motor input, and thegear motor output links to each other with the plunger pump, the water pitcher entry connects the well site to come the water line, and the export is through water discharging pipeline and plunger pump entry intercommunication, sour jar of entry links to each other with last liquid centrifugal pump, and the export is through acid discharging pipeline line and plunger pump entry intercommunication, the plunger pump export links to each other with the well head through the discharge manifold. The device can accomplish multiple functions such as unloading acid, complex acid, acidizing fluid supply, acidizing fluid injection simultaneously, and site operations only need use an equipment can accomplish online augmented injection operation, has reduced equipment utilization rate, adopts purge system to sweep, collect and the centralized processing the raffinate in installing after the operation to reach augmented injection mesh safe, high -efficient, the environmental protection.