Abstract：The existing specifications and requirements for the general layout parameter design of aircraft landing gear are mainly applicable to traditional fighters. If the landing gear of pusher propeller reconnaissance and strike UAV is designed according to these specifications and requirements, it will bring many problems. This paper starts with the layout and flight characteristics of the pusher propeller reconnaissance and strike UAV, analyzes the definition and connotation of the landing gear general layout parameters, and puts forward a design suitable for the landing gear general parameters and general layout of the pusher propeller reconnaissance and strike UAV. Through the analysis of takeoff and landing characteristic of the pusher propeller integrated reconnaissance/strike UAV, The Tail Down Angle(θTD) can reduce and suggest：≥6°(static, contain clearance); The Turn Over Angle(θTO) can reduce and suggest：11°～12°(static); The Parking Angle can reduce and suggest：-2°～-1°. The main landing gear arrangements can choose this type, which are installed onto fuselage of UAV, at extended position, the main landing gear is at the lower side of fuselage, being shape / \. By comparing the landing gear layout parameters of predator B UAV, the effectiveness of this design is verified. In addition, this design is applied to the landing gear general parameters and general layout of the Wing Loong UAV, and good results have been achieved..