In order to solve the problems in the installation of the cabin board on the mechanical 6-Dof turnover vehicle, a method of satellite cabin board installation based on industrial robot is proposed. The operation mode of mobile robot combined with simple support vehicle is adopted, and the robot flexible force control technology is used to realize the automatic pin-guided assembly of the cabin board. The research results have been applied to the installation of the cabin board of Beidou 3 in China, the assembly time of a single cabin board has been shortened from more than 1 hour to less than 30 minutes, the number of operators has been reduced from 5 to 3, and more than 400 times of cabin board assembly have been completed in practical application. The results show that this method can provide valuable time for the intensive development of Beidou 3, and provide a reference for the installation of heavy components in other fields.