The invention discloses a power supply and distribution control device for an unmanned aerial vehicle. The power supply and distribution control device can reliably supply electricity and can achieve high efficiency, intelligentization, universalization and miniaturization. The power supply and distribution control device comprises a power supply control module, an airborne generator, a standby battery pack and a ground DC stabilized power supply, wherein the airborne generator is configured to supply electric energy to airborne electronic equipment of the unmanned aerial vehicle when the rotating speed of an engine is greater than an appointed threshold and to charge the standby battery pack which is not fully charged; the standby battery pack is configured to provide electric energy to the airborne electronic equipment of the unmanned aerial vehicle when the rotating speed of the engine is smaller than the appointed threshold or the engine is broken down; the ground DC stabilized power supply is configured to supply electricity when ground debugging is carried out and to charge the standby battery pack which is not fully charged; and the power supply control module is configured to be switched among three power supplies of the airborne generator, the standby battery pack and the ground DC stabilized power supply and to carry out serial port communication.