This machine is designed for the raw materials used in shoe uppers, such as leather, artificial leather, fabric, etc., by cutting test pieces and placing them on a damp floor, and conducting repeated bending tests under a certain pressure to simulate the bending process of the shoe insole during walking, in order to determine the material's permeability resistance index, water absorption and hydrolysis adsorption ability of the insole and insole, or to provide a basis for the development of improved materials and waterproof processing.