Flexible loading water sac system of three-dimensional simulation experiment table

The invention relates to a flexible loading water sac system of a three-dimensional simulation experiment table, which comprises a water sac, a hydraulic loading device, a strain measurement device and a control device, wherein the water sac comprises a capsule and a water filling pipe, and the hydraulic loading device comprises a plunger pump, a stabilizator, a bumper, a flow control module, a pressure control module and a safety valve; the strain measurement device comprises a plurality of strain gauges; and the control device comprises a controller, a hydraulic servo device and a displayer.