Air duct structure with constant temperature change applied to baking test

The utility model discloses a constant temperature change air duct structure applied to a baking test, which comprises an air storage frame, the top of the air storage frame is fixedly provided with a hot-air blower through a support, the inlet end of the hot-air blower is communicated with an air inlet pipe, and the outlet end of the hot-air blower is communicated with an air delivery pipe. The hot air blower blows hot air into the air storage frame through the air inlet pipe and the air delivery pipe, the hot air can be in contact with the surface of the air guide plate after entering the air storage frame and is blown out through the multiple air outlet holes, the uniform air outlet effect is achieved, and when the temperature in the test box meets the requirement, the hydraulic rod can be controlled to contract, so that the air outlet is uniform. The hydraulic rod shrinks to drive the trapezoidal column to move backwards, the trapezoidal column moves to enable the multiple blocking strips to descend under