The utility model provides a space remote sensing imaging semi-physical simulation platform based on an equal scaling mode, which comprises a motion system, a camera load, a solar simulator system anda sand table, and is characterized in that the motion system comprises an inner gantry, an outer gantry and rails which are respectively connected with the inner gantry and the outer gantry in a sliding manner; the solar simulator system comprises a solar simulator, a first sunlight reflector arranged right above the solar simulator and a second sunlight reflector connected with the top of the inner gantry; the solar simulator is placed on the ground, the sand table is horizontally placed between the tracks, and light emitted by the solar simulator is reflected to the sand table through the first sunlight reflector and the second sunlight reflector. The camera load is connected with the top end of the outer gantry to realize imaging of the sand table. According to the utility model, the relation of vertical imaging of a camera load at a sub-satellite point in remote sensing is replaced by horizontal imaging in an indoor physical simulation platform, so that the problem of insufficientdeployment space of a physical simulation system is solved, and the overall construction difficulty is reduced.