This paper introduces the improvement on the traditional belt tr ansmitting system by using SR motor.With the charcteristics of SR motor made full use o-f hig h efficiency, light starting cur rent and high starting speed when the r unning speed of SR motor changes in a wide range, t he system omits the gear- speed change- case and electromagnetic brake that ex ist in the tr ad-i tional transnictting system, resulting in the great increase in t he ratio of the performance to the cost. A programming control circuit w ith high flex ibility , low cost and perfect function is giv en.