The invention discloses an unmanned aerial vehicle landing guiding system based on multi-mode navigation and a method thereof, wherein the system and the method belong to the field of unmanned aerial vehicle flight navigation technology. The system and the method are suitable for a vertical take-off and landing unmanned aerial vehicle. The system comprises a parking space, a parking space reference point, a cooperation lamp array, a power supply unit, a radio beacon transmitter, a satellite positioning module I and a communication module I, wherein the cooperation lamp array, the power supply unit, the radio beacon transmitter, the satellite positioning module I and the communication module I are arranged next to the parking space. The system further comprises a landing guiding module and a satellite positioning module II which are arranged on the unmanned aerial vehicle. According to the method of the invention, radio direction finding, visual guiding, satellite positioning and data fusion are utilized for guiding the unmanned aerial vehicle to automatically land on the preset parking space. The unmanned aerial vehicle landing guiding system has advantages of improving precision and reliability in autonomous landing of the unmanned aerial vehicle, reducing a blind landing risk, and realizing high interference resistance. The unmanned aerial vehicle landing guiding system can be used for unmanned aerial vehicle landing guiding on a fixed platform and a movable platform.