Vertical enclosure structure horizontal displacement monitoring device for foundation pit model test

The invention discloses a vertical enclosure structure horizontal displacement monitoring device for a foundation pit model test. The vertical enclosure structure horizontal displacement monitoring device comprises a model box, a foundation pit model test system and a monitoring system, wherein the model box is composed of a model box frame, side plates and a bottom plate, the model box is filled with a test soil body, the foundation pit model test system is arranged in the middle of the model box and is composed of a vertical enclosure structure and an inner support, the monitoring system comprises a thin steel wire, a fixed pulley and a digital display dial indicator, one end of the thin steel wire is fixed to a preset hole of the vertical enclosure structure, and the other end of the thin steel wire horizontally extends to the fixed pulley and is vertically upwards connected with the digital display dial indicator after winding around the fixed pulley. According to the vertical enclosure structure horizont