In the test of the security and robustness of industrial control protocols, there are multiple test methods, such as black box test, white box test, and gray box test. However, the industrial control system is complex and changeable, and the transmission protocols are diverse. It is difficult to achieve unified testing with one method. As a black-box test method, fuzzy test has strong practicability and can solve this problem to a certain extent. This article will explain the main characteristics of industrial control protocol testing, and introduce the related research work of fuzzy testing applied to industrial control protocol testing. Finally, the future research directions of fuzzy control of industrial control protocols are forecasted.