The utility model provides a horizontal well water control completion method evaluation experimental device. The device comprises a simulation shaft horizontally arranged. A well completion simulation pipe column extends into the simulation shaft from the open end of the simulation shaft in a sealed mode. A drain opening, an exhaust port and a fluid inlet are formed in the side wall of the simulation shaft. A fluid outlet is formed in the end, extending out of the open end of the simulation shaft, of the well completion simulation pipe column. The fluid outlet is communicated with a liquid storage tank through a fluid outlet valve. An outlet of the liquid storage tank is connected with a control valve, a centrifugal pump, a flow meter and a fluid inlet valve in sequence. The fluid inlet valve is connected with the fluid inlet of the simulation shaft. A differential pressure sensor is arranged between the fluid inlet and the fluid outlet. A well completion simulation pipe column linear displacement and location device is arranged between the end of the well completion simulation pipe column and the open end of the simulation shaft. According to the device, the flow meter and the differential pressure sensor are used for recording differential pressure of multiple well completion methods under different flows and different parameters, and the water control effects of the respective parameters of the different well completion methods can be compared and analyzed.