Abstract: According to the fact that the human-machine interaction interface of traditional welding centralized controller affected the real-time performance of welding task, and that the communication speed between multi controllers was low and unstable, a human-machine interaction design of welding centralized controller based on heterogeneous multi-core controller was proposed. Through running Linux and FreeRTOS systems on different cores at the same time, the main welding task and human-computer interaction task were run on different cores respectively. The data transmission between the two cores was carried out through inter-core communication task to complete the welding process control, and the decoupling of real-time task and non-real-time task was realized. The experimental results showed that the communication rate of heterogeneous multicore reached 6675.78 \mathrmkB / \mathrms, which ensured the real-time control of welding process, and displayed and controlled the slave computers in real time through human-machine interaction interface.