The Double-layer Stainless Steel Reactor is a pivotal biochemical instrument, renowned and extensively utilized across modern fine chemical, biopharmaceutical, scientific research, and experimental industries. Its versatile applications include concentration, distillation, reflux, separation, and purification, all performed under controlled constant speed, force, and temperature. This remarkable reactor is an indispensable tool for teaching, experimentation, pilot projects, and production. By circulating a hot or cold solution through the reactor's interlayer, it maintains a constant temperature to heat or cool the materials inside, while also offering stirring capabilities. The reactor effectively manages the evaporation and reflux of the reaction solutions, ensuring precision and control. Once the reaction concludes, materials are conveniently discharged via the bottom port, highlighting its user-friendly design. This reactor embodies the ideal equipment for modern chemical sampling, petrochemicals, biopharmaceuticals, and the synthesis of new materials.