A double-layer glass reaction vessel is a device that uses a double-layer glass reaction vessel interlayer to inject a constant temperature (high or low temperature) hot solution medium or cooling medium to heat or cool the materials inside the reaction vessel at a constant temperature, and can provide stirring. The material undergoes a reaction in the reactor and the evaporation and reflux of the reaction solution can be controlled. After the reaction is complete, the material can be released from the discharge port at the bottom of the reactor, making the operation extremely convenient. It is an ideal equipment for modern chemical small sample, medium sample experiments, biopharmaceuticals, and new material synthesis. Can provide high-temperature reactions (equipped with corresponding circulating oil bath pots, the highest temperature can reach 200 ℃); Can perform low-temperature reactions (equipped with corresponding low-temperature cryogenic liquid circulation systems, with low temperatures up to -120 ℃); It can also be evacuated to perform a vacuum reaction. Moreover, its unique design makes the experiment safer and more convenient.