The invention discloses a domestic water pressure compensation device, which comprises a base, wherein a protective platform is welded at one side of the top of the base; a water storage tank is fixedly arranged at the side, away from the protective platform, of the base; a first groove is formed in the protective platform; a sliding platform is arranged in the first groove in a sliding mode; a second groove is formed in the sliding platform; a main water pump is fixedly arranged in the second groove; and a first fixed rod and a second fixed rod are symmetrically welded at two sides of the top of the sliding platform. The domestic water pressure compensation device provided by the invention is simple in structure and convenient for operation; by observing a pressure gauge, an auxiliary water pump can be started when pressure of domestic water is insufficient; the main water pump can be fixed to the sliding platform; the sliding platform can be moved into the first groove when the first pull rod is pulled, and a traction rod, the sliding platform and the main water pump can be fixed when a limiting rod is clamped into a clamping groove; the auxiliary water pump can be started in the case of faults of the main water pump; fixation of the sliding platform and the main water pump can be released as a second pull ring is pulled; therefore, the domestic water pressure compensation device is convenient to detach, and the main water pump is convenient to replace or maintain, without influence to normal use of the device.