The utility model discloses a many rotor unmanned aerial vehicle stability testing device, including test platform and test data processing unit, test platform includes base, center pin, spider and rotor dead lever, well spindle connection base and spider, a plurality of rotor dead levers are located duplex winding center pin periphery setting on the coplanar, rotor dead lever one end connection center axle, the other end are equipped with the tongs that is used for single rotor arm of fixed unmanned aerial vehicle, the tongs top has set firmly pressure sensor, test data processing unit includes data acquisition module, data transmission module, data disaply moudle and treater, data acquisition module is connected respectively to the output of pressure sensor and spring tension meter among the test platform, data transmission to treater that data acquisition module will gather, the treater pass through the data transmission module with data transmission to the data disaply moudle in order to show data. The utility model discloses can be applicable to different rotor quantity unmanned aerial vehicle's stability testing, the concurrent operation is simple and easy, conveniently carries.