Crystal bar growth control method and control system

The invention provides a crystal bar growth control method and a control system. The crystal bar growth temperature optimization method at least comprises the following steps: setting a target crystal bar diameter, a target pulling speed and a target growth temperature; detecting the actual crystal bar diameter, regulating the lifting speed according to the actual crystal bar diameter to form the actual lifting speed, and comparing the actual lifting speed with the target lifting speed; when a difference value between the actual pulling speed and the target pulling speed exceeds a deviation range, adjusting a target growth temperature to form a new target growth temperature; and repeating the steps until the growth of the crystal bar is completed. According to the method, the difference between the actual growth temperature and the target temperature is reduced through real-time correction of the crystal growth temperature in the crystal bar growth process, fine control in the crystal growth process is achiev