In order to solve the problems of small-sized punch’s die-filling process which caused by manual operation, this paper designs a punch’s die set height controller based on embedded computer system. This controller uses PC/104 bus-single computer as the main controller, and is companied with outer SSI interface data collecting system, human-computer interaction and generator controlling block, which aims to realize the functions of die’s data management, die set height monitoring and control. At the same time, this kind of controller have high precision，small consumption, low cost and sturdy material makes this controller especially fits small-sized punch processing and operating spots. It has a bright future of marketing application..