As the most common and an important part of the passive safety product and restraint systems，seat belt has the simple appearance and structure and the important function of saving lives of occupants in critical situation. At present，China has plenty belt manufacturer and more product ranges. In order to explore difference of performance of the seat belts made by different enterprises，an objective survey for 7 typical companies and their products has been made. The results of entropy analysis show that different enterprises have some differences on the dynamic performance and the strength of key components. From a subjective survey，although the products of the selected nine companies can basically meet the requirements of the national standard，but the production capacity and the details of the appearance of the key components are still different. The lack of sensitivity and comfort of the products of some enterprises should reduce the users’ experience. But in general，the difference between the own-brand products，foreign-invested products and JV products are narrowing. OEMs and end-user should break prejudice on the independent brand enterprise’s seatbelt products to select a product meeting the actual demand and create equal market environment for the seat belt industry. <<