The electrical connection of each device inside the ultra-micro aerial vehicle（UMAV）， mainly relies on the traditional way of lead wire welding. There are many problems in this way， such as low efficiency， error-prone， easy to broken welding wire， difficult debugging， etc. Ordinary wire-type cables and connectors are easy to use， but too bulky to suit the UMAV. A design method of fuzz button flexible electrical connection component for UMAV is proposed. The fuzz button component is used as the connector， the rigid-flexible joint plate is used as the transmission cable， and the three-dimensional design of aircraft structure is combined to realize the reliable electrical connection of various electrical devices inside the UMAV.