Product sorting step - a step that can be done manually, but with the help of robots, productivity and efficiency are doubled, especially reducing labor, increasing labor productivity. reduces product costs and is highly competitive in the market. Calculate the design and manufacture of a robot arm that sorts products by height to partly meet that task. The main work of the project is: calculating, designing and manufacturing robotic arms to perform the task of classifying products by height based on theoretical analysis and synthesis methods, scientific experimental methods, and methods of analysis and modeling method.