Abstract: In order to solve the problems confronted in designing the jacquard MCU based controller,a new method is presented to develop jacquard MCU W78E516B based controller,including hardware and software.Both the encountered and potential technical problems in the realization of the conlroller are analyzed,and corresponding measures are proposed.By replacing the traditional floppy drive with USB interface, the problem of weft number restricting the pattern is solved.Furthermore,our approach can protect the data at unexpected shutdown,so that after an accident it can make rapid resumption of production,and produces no scrap file in spite of frequent deletion and copy,which is ensured by the files manager system.This controller has been put into operation in several mills,and the results show that it works smoothly and accurately.