Abstract: In order to increase the practicability of a remote welding robot and meet the requirements of tools changing in the remote maintenance,a quick-change technology of work tools for a remote welding robot was designed.According to the welding task,the internal cylinder jointed by pneumatic and interlocked by mechanical method was used,which makes the equipment have the characteristics of straightforward structure,small volume and light weight etc.The results show that the remote welding robot system implements multiple tasks and realizes the commonality;it can not only economize the cost,but also enhance the efficiency.The paper mainly introduces the structure,work principle and implement-method of the equipment using this technology.