The overall composition and design principles of the fuselage automatic docking platform are expounded, and the mechanical composition of automatic docking platform and electrical control system architecture are analyzed in detail. The positioning accuracy of the automatic docking platform, stress control and automatic docking function are tested by using a laser interferometric device, the front fuselage sample and the rear fuselage section sample. The test results showed that: The NC locator positioning accuracy is 0.015mm, which may meet the requirements of the fuselage docking assembly precision; During the attitude adjustment, the X, Z-axis stress of the front and rear section samples is less, the body is not damaged; The fuselage automatic docking platform can complete the adjusting posture of the front and rear fuselage and the fuselage technical indicators detection after adjusting posture, docking and assembly.