The utility model discloses a tap water pipe fitting. Water pipe connection field, tap water pipe fitting, water pipe connector, an anti-corrosion layer is arranged in the water pipe joint; a pipelineis arranged in the anti-corrosion layer; a rubber pad is clung to the upper end of the anti-corrosion layer; the outer side of the left end of the water pipe connector is fixedly sleeved with a rubber ring. The outer side of the left end of the water pipe connector is fixedly sleeved with a fixing ring, a rubber ring is tightly attached to the left side of the fixing ring, a threaded chuck is tightly attached to the right side of the fixing ring, through cooperation of the rubber ring, the fixing ring and the threaded chuck, two water pipes can be connected conveniently, water flow can be prevented from overflowing through the design of the rubber ring, and water resources are saved. The water pipe joint can be conveniently mounted by the wrench through the fixing block, and mounting efficiency is prevented from being affected by slipping of the wrench; through cooperation of the external pipe, the mounting hole, the screw, the rubber pad and the nut, the filter screen is convenient to disassemble and assemble, impurities in water can be filtered through the design of the filter screen, and water quality is improved.