The invention discloses a dryer used for reactions in chemical laboratories. The dryer comprises a placement rack, wherein the placement rack is mounted below a base; and a body is arranged above thebase. A stirrer is mounted in the dryer and consists of mounting heads, stirring rods and a spring, so that when the spring is squeezed with hands, the two stirring rods can be squeezed together; then, the stirrer is placed in a drying chamber from a feed inlet; when the stirrer is placed in the drying chamber, the elastic force of the spring can cause the stirrer to be fixed to the inner wall ofthe drying chamber; and at the time, when chemical materials are dried, the stirring rods on the stirrer stir the chemical materials to make the drying more thorough. Moreover, the drying chamber adopts a spherical structure, so that no corners can be hidden in the drying chamber and all chemical materials can be better dried, thereby improving the service performance of the dryer.