This article discusses the positioning principle of a vehicle mounted optical imaging system.Based on this,a vehicle mounted BDS optical 3D imaging system is designed and implemented.The imaging system calculates the center point position of the imaging system through a high precision BDS receiver,and assists inertial navigation equipment in calculating the attitude information of the imaging system.Through comparative experiments,the important value of BDS high precision positioning in optical 3D imaging and the optimization direction of imaging systems are analyzed and explained.The organic combination of BDS positioning sensor and optical sensor is of great significance in improving the effective acquisition of optical image information and precise perception of specific targets.