The machine is an automatic metallographic sample inlaying machine with cooling function, applicable to thermal inlaying of all materials (thermoset and thermoplasticity). Set inlaying parameters such as heating temperature, heat holding time, acting force, etc., put sample and inlaying materials, close the gland, press down the button, and then the machine can inlay automatically without a watchman. The machines may change four kinds of dies at will according to various requirements of samples, and also can press two samples simultaneously.