Due to the significant temporal variability, nonlinearity, and strong coupling of laser temperature characteristics, traditional control methods are difficult to meet precise control requirements. To address the above issues, a nonlinear self disturbance rejection control method for laser temperature is studied. This method utilizes the thermistor encapsulated inside the laser to collect real-time temperature of the laser and calculate the real-time error between it and the ideal temperature. Using error as input, a nonlinear self disturbance rejection controller is used to calculate the real-time control signal of the laser temperature, achieving precise control. The results show that under the control of the studied method, the coefficient of variation is relatively smaller, indicating that the method performs better in control effect and can better control the laser temperature to be closer to the ideal temperature, making the temperature more stable and reliable.