Single layer glass reactor is an equipment which is a collaboration of vacuum state, distillation, reflux, stirring, oil/water heating, heating mantle. It can do all kinds of biochemical reactions and synthesis reactions at a constant temperature condition. It is also a closed system on the whole. Circulating water vacuum pump can pump into the reactor sorts of liquids and gases. The reflux or distillation is possible under different temperature state. The single layer glass reactor has water/oil heating bath or heating mantle itself. Water/oil bath temperature is digital display, which can meet constant temperature state, fast temp. Rising, accurate controllers.1-50l is circular and more than 50l is cylinder. After heating we can add the cooling coil in the tank to cool the material in short time.