During construction, multi-joint long-flexible cantilever beam structure of construction machinery will generate different frequencies vibration which serious affect personal safety and construction efficiency. Besides that, in the tendency of construction mechanical arm pursues extreme length-to-weight ratio, vibration has been one of crucial elements in over-length arm application. This article using test data analysis arm rotation vibration characteristics based on vibration mechanism. Meanwhile, the article researches two-degree freedom vibration model, and innovative uses of parameter identification method to establish transfer function of arm rotation vibration. Furthermore, this article using negative feedback matrix control strategy. It has proven that the rotation vibration amplitude can be reduced more than 80% using this method.