For the purpose of reducing the impact on the machine tools, a new fivesegment Scurve acceleration and deceleration control algorithm was proposed with maximum acceleration. Analysis formula was adopted to analyze and recalculate the maximum speed of the shorttrack code in machining. Considering the jerk may be oversize when the maximum speed was recalculated, an iterative algorithm with fast adjustable parameter was proposed to restrict the jerk, so as to reduce the changing rate of acceleration. Simulation results show that this algorithm is relative to few parameters and is easy to realize by programming. Seeking an appropriate and adjustable parameter was helpful to reduce the iteration times enormously. By this algorithm, the jerk was restricted quickly for avoiding sudden change of acceleration. A smooth change of the velocity in machining is ensured, meanwhile, this algorithm improves the flexibility of system effectively.