In order to solve the quality control problem of certain type propellant product in automatic batch production, reduce the detection data deviation caused by manual measurement, improve the repeatability of product detection, and improve the detection efficiency, a set of visual measurement equipment for on-line detection of work piece is developed. According to the dimension characteristics of various propellant products, a set of special database for visual measurement is established, and the test data is analyzed and processed with customized software algorithm. The results show that the equipment can quickly screen the unqualified products, trace the product problems and guide the production process optimization analysis, and reduce the personnel work intensity.