Freeze-thaw test apparatus of different freeze-thaw states of multiple samples

Disclosed in the utility model is a freeze-thaw test apparatus of different freeze-thaw states of multiple samples. The freeze-thaw test apparatus comprises a plurality of freeze-thaw circulating boxes with identical structures. Each freeze-thaw circulating box consists of a box body, a door, a glass observation window, a touch type liquid crystal display screen, a power input interface, a power output interface, a first heat-resistant separation board, a transformer, a refrigeration compressor, a temperature sensor, a humidity sensor, a freeze-thaw state controller, a U-shaped tube type heat exchanger, a heating resistance wire and a multi-layered sample clamping tool; the sample clamping tool includes a clamp plate and a cover plate; the freeze-thaw state controller includes a micro controller module, an alternating-current/direct-current conversion circuit module, a data storage device module, a first serial port communication circuit module, a second serial port communication circuit module, a clock circuit module, a first relay, a first contactor, a second relay and a second contactor. The freeze-thaw test apparatus can be used and operated conveniently; the different freeze-thaw state tests of multiple samples can be realized simultaneously; the freeze-thaw test efficiency and precision can be effectively improved; and the practicability is high.