Abstract: In a dial indicator correcting method, a first command is sent to a single drive shaft for controlling a push rod to move toward dial indicators. The method records a first indicated value of each dial indicator when the push rod contacts with one of the dial indicators, and records a second indicated value of each dial indicator when the push rod has contacted all the dial indicators. The method further sends a second command to the single drive shaft for controlling the push rod to move when a distance of the push rod equals a measuring range, and records a third indicated value of each dial indicator when the push rod moves with each moving step. By subtracting the third indicated value from the second indicated value, a forth indicated value of each dial indicator is obtained and is corrected by a running deviation of the single drive shaft.