To improve the working ability of deep-water riser horizontal welding robot under the complex working conditions of J-type pipe laying,a horizontal welding robot remote operation control scheme based on virtual reality technology was proposed.Based on the 3D modeling of robots,virtual simulation,remote operation control and other technologies,the 3D model of horizontal welding robot was established by comprehensively using UG and 3DMAX.A software development platform based on Unity3D was built,the virtual simulation model and homework scene of the robot were built.A horizontal welding robot remote operation human-machine interactive interface was designed using graphical user interface system.The simulation results show that the virtual reality human-computer interaction is good,it can accurately capture the physical posture and running state of the riser horizontal welding robot and dynamically adjust,motion simulation and collision detection are effective in real time.