Combining robotics and 3D printing technology,the group uses RobotStudio and Inventor software as the basis to construct the 3D printing system model and simulation animation effect of industrial robots;according to the actual movement characteristics of the industrial robots,the trajectory planning of the equal-layer-thickness slicing and circular cross-section scanning is designed,so as to realise that the industrial robots can complete the 3D printing process of the cubic body.Use ABB's PC SDK to develop the upper computer control system based on Visual Basic.NET,and through the establishment of two sets of variables responsible for'communication'and'execution'in the robot system,the upper computer can realise the orderly control of the system;at the same time,create friendly human-machine interaction.At the same time,a friendly human-computer interaction interface is created to provide users with an intuitive and convenient experience and reduce learning costs.The debugging results show that the system runs with accurate logic and complete functions.