The invention discloses a stepping motor acceleration and deceleration control method and belongs to the motor control adjusting technology field. The method comprises the following steps of based on a maximum operating speed of a controlled stepping motor, according to a preset speed calculating formula, generating a speedometer of the controlled stepping motor; and based on the speedometer, using a timer to generate a corresponding pulse so as to drive the controlled stepping motor to carry out acceleration and deceleration motion. According to a speed calculating formula of a single-chip microcomputer, a speedometer of the single-chip microcomputer is acquired and the speedometer is taken as a value of a single-chip microcomputer register. The speedometer is used to drive the timer to output an increase amplitude of a pulse frequency and the pulse frequency output by the timer is changed so as to drive the stepping motor to carry out the acceleration and deceleration motion. Through the above mode, motion of the stepping motor can be accurately controlled so as to guarantee that the stepping motor can reliably operate and does not generate a step out condition; and a position of an actual load of the stepping motor is consistent with a load position set by the controller and an error is avoided.