Abstract: At present，most of the smoke extractors need to pull smoke manually，and the form of the smoke belt is single. There are many restrictions on use in the flight show，the installation of the device is difficult，and there are few kinds of researches on the smoke extractors for small rotorcraft UAV. In order to make up for the above shortcomings and improve the practicability of the smoke extractor，this paper designs an intelligent smoke extractor consisting of a gas conducting device，a switch device，a smoke generating device，a control device，and a fixed device，and elaborates the design ideas of its mechanical structure. Base on it，the corresponding control circuit was designed and manufactured. The semiphysical simulation verifies the expected functions of the smoke extractor including manual，automatic，and intelligent smoke extraction，optimizing the practicality of the existing，and expands the scope of application of the smoke extractor.

Key words: intelligent smoke extractor, aircraft flying show, automatic control