The invention discloses a method and apparatus for monitoring a temperature rise of a motor winding. The method comprises the following steps: establishing a dynamic thermal energy equation of a motor; acquiring, calculating and obtaining state parameter values of the motor, related to the dynamic thermal energy equation at a current time point; and based on the dynamic thermal energy equation, according to the state parameter values, obtaining the temperature rise of the winding of the motor at the current time point through calculation. Compared to the prior art, the temperature rise of the motor winding can be more accurately and efficiently monitored according to the method and apparatus provided by the invention; and at the same time, according to the method and apparatus provided by the invention, the internal structure of the motor does not have to be changed, the realization is simple, the cost is low, and popularization difficulty is quite low.