Turbofan rear-mounted engine

The utility model discloses a turbofan rear-mounted engine which is designed for solving the problems of difficult design, high cost and the like in the prior art. The turbofan rear-mounted engine comprises a turbojet engine, a converter and a fan, wherein the turbojet engine is used for providing power; the converter is installed at an air nozzle behind the turbojet engine, and used for converting the jet power of the turbojet engine into the rotating power; and the fan is connected on the turbine power output shaft behind the converter. By adopting the fan rear-mounted structure, the fan and the turbojet engine are designed in a separating manner, the whole design is simple, the structural part is less, the weight is light, and the processing and manufacturing are easy; and the turbofan engine can be made by utilizing the structure, thus being capable of improving the thrust weight ratio.