Bearing heater

A bearing heater comprises an electric heating cup (1), a heat conductor (2), a power line (3), a distribution box (4), a temperature controller line (5) and a temperature controller (6). The bearing heater is characterized in that the electric heating cup (1) of the bearing heater is a shallow water cup provided with a round bottom and provided with the temperature controller (6), the heat conductor (2) is installed in the electric heating cup (1), and the electric heating cup (1) and the temperature controller (6) are connected with the distribution box (4) through the power line (3) and the temperature controller line (5) respectively. The bearing heater is suitable for heating bearings of mechanical equipment, time and labor are saved when a bearing is assembled, damage of the bearing and a shaft is avoided, the bearing and the shaft are concentric, vibration of the equipment is prevented, it is guaranteed that the equipment operates steadily, and the service life of the equipment is prolonged.