The invention relates to the technical field of mechanical equipment, in particular to a testing machine used for testing the product quality. The testing machine is provided with a power unit which drives revolving parts to revolve and a digital testing unit, wherein a linear scan camera on the digital testing unit carries out real time image pick-up along with the revolution of the revolving parts, and transmits the images to an image processing module of the digital testing unit; and the images picked up by the linear scan camera are amplified and displayed by a display screen. Operators test products according to the images on the display screen so as to overcome the defect of testing the products directly by eyes, thereby improving the testing speed and stability, achieving 100 percent testing to the products, and thoroughly stopping unqualified products entering the markets. Moreover, an automatic material feeding and discharge mechanism is also added so as to achieve the continuous, high-efficiency and high-quality automatic testing of the products.