The configuration characteristics of multi rotor unmanned aerial vehicles determine that they are difficult to adapt to complex flight missions. To meet different mission requirements, combining and assembling specific configuration aircraft should be a feasible development direction. Before and after assembly, various flight characteristics of the aircraft change to varying degrees, and the impact of external disturbances also varies, posing great challenges to the design and verification of flight control systems. This article designs a spliced tilted twin rotor aircraft and establishes its flight dynamics model. Based on this, the control strategy of the pre and post assembly aircraft and the position and attitude controllers based on linear active disturbance rejection control (LADRC) are designed, and the simulation verification of aircraft control in gust interference environments is completed. Compared with traditional PID controllers, the superiority of LADRC has been verified. Finally, a real aircraft attitude stability control verification was conducted, and the research results showed that the spliced tilt-rotor dual rotor aircraft and its linear active disturbance rejection controller had strong anti-interference and robustness. The aircraft had good flight control effects before and after assembly.