The vacuum testing machine can detect and eliminate the bad jar automatically and automatically. When the vacuum degree is different in the tank or bottle body, the deformation of the tank or bottle cover is different. By detecting the small deformation of the cover, the vacuum degree is obtained. With touch screen operation, simple operation, easy adjustment, online data analysis, arbitrary tank type data storage, automatic correction, synchronous rejection, and so on, it is widely used in two aluminum cans, three iron cans, glass bottles and all other cladding containers in many beverage factories and Cannery factories.