Simulation test device for underwater concrete defect repairing technology

The invention discloses a simulation test device for an underwater concrete defect repairing technology. The simulation test device comprises a model box, a pressurizing device, a refrigerating and heating circulating system and a control system connected with the outside, the model box comprises a stirring box, a water tank box and a supporting column used for supporting the model box. The water tank box comprises a top beam, a bottom beam, a water tank top plate, a water tank bottom plate and stand columns for connecting the top beam and the bottom beam, a space formed among the adjacent stand columns, the top beam and the bottom beam is an observation window, and a test piece groove is concavely formed in the water tank bottom plate; the pressurizing device is connected with the stirring box through a water inlet pipe, the refrigerating and heating circulating system is connected with the water tank box through a copper pipe, the refrigerating and heating circulating system is used for controlling the wate