Fmm-50 medium oil-powered long-duration composite wing VTOL UAV adopts the overall layout of composite wing with fixed wing and quadrotor, which solves the difficult problem of vertical take-off and landing of fixed wing UAV in a simple and reliable way. With the characteristics of long flight time, high speed and long distance of fixed wing UAV and the function of vertical take-off and landing of rotary wing UAV, the vertical take-off and landing mode greatly enhances the environmental adaptability of the UAV platform. The body material adopts carbon fiber composite material and autoclave integrated molding process, which has the advantages of high body strength, high stiffness and light weight.