The utility model provides a magnetic stirring heater which comprises a reaction still, a tray with a heating body, a rotating magnetic field generator and a control circuit board. The rotating magnetic field generator generates a speed-adjustable high-intensity rotating magnetic field to drive a magnetic stirrer in the reaction still to rotate together, a solution in the reaction still is stirred for mixing and dissolving; under the control of the control circuit board, the magnetic stirring heater realizes the following stirring manners: the stirring speed is increased gradually, the magnetic stirring heater rotates at constant speed, the stirring speed is decreased gradually, and the magnetic stirring heater rotates clockwise and anticlockwise at regular time; the control circuit board judges whether the magnetic stirrer is synchronous or absent in real time so as to control the rotating magnetic field generator to automatically slow down for recapture or give an alarm for reminding. Compared with a traditional motor-type stirrer, the magnetic stirring heater has a simple structure, is excellent in antiseptic property and low in failure rate, can realize automatic control and automatic error correction, is free from the problem of loss of excitation at high temperatures, and is high in practicality.