With the increasing of global market competition and dynamic change of market environment, consumer needs are more personal and diversified, enterprise production is more flexible. At present, the production cycle period of traditional manufacturing industry is long, delivering goods is not in time, product quality is not good and resource are not used in reason. Because of the phenomena, products are not met the requirements of market and lack of market competition ability. For changing the situation, the development direction is building concurrent agility dynamic alliance of product development. So this paper puts forward an improved fuzzy reform optimization method of design task in Concurrent engineering (CE). Using this method, enterprise can develop product rapidly to satisfy consumer requirements and have high quality, low cost, reasonable price and good service, that is because it can assign right task to right person in right time for shortening development time of product.