The invention relates to the field of hot-rolled band steel production control, in particular to a method for adjusting the zero position of a hot continuous rolling mill. A method for adjusting the zero position of two sides of a hot continuous rolling mill includes: first, recording the diameter D1 of a support roller before zero position adjustment, and measuring the diameter D2 of the support roller during the zero position adjustment; then, comparing D1 with D2, and making the following choice, 1: when D1 is not equal to D2, selecting the support roller mode to adjust the zero position of the rolling mill, 2: when D1 is equal to D2, selecting the working roller mode to adjust the zero position of the rolling mill; finally, confirming that the operation is completed by the operator, confirming the relationship between the roller seam and the oil injection via the control system, detecting the current position of oil injection as the zero position of the rolling mill, pressing the system reset down, and completing the zero position adjustment. According to the method for adjusting the zero position of two sides of a hot continuous rolling mill, during the zero position adjustment, by judging the diameter of rollers first and then determining whether the support roller mode or working roller mode is selected to adjust the zero position of the rolling mill, the precision of the zero position adjustment is improved, the stability of hot-rolling production and the quality of products can be guaranteed.