The invention provides a flat plate sand packing model percolation experiment system. The flat plate sand packing model percolation experiment system comprises a sand packing model solid unit, a resistance acquisition unit, a pressure field acquisition device, a measuring unit, a valve unit, a computer, a fluid pipeline, a sand packing pipe, a vacuum pump, a peristaltic pump, an electrode point, a resistance data acquisition unit and an electric bridge gauge, wherein the sand packing model solid unit comprises a model cavity, a model cover plate, a fixed bolt and a sealing part; the sand packing model solid unit is vertically mounted; a peristaltic pump injection device is commenced with the sand packing model solid unit through a horizontal well wellbore valve and a water injection well valve respectively; a wellbore is arranged on the model cavity of the sand packing model solid unit; the wellbore is connected with the electrode point, and is finally connected with the electric bridge gauge; and a production well valve is connected with an oil-phase and water-phase metering cup. The flat plate sand packing model percolation experiment system can be used for accurately measuring and simulating the change of stratum resistivity and realizing three-dimensional resistance imaging; and pressure is acquired so that pressure field data can be effectively obtained, and influences on the stratum oil production efficiency by the distribution of a horizontal well and a vertical well can be analyzed and simulated.