Four-rotor surveying and mapping unmanned aerial vehicle

The utility model provides a four-rotor surveying and mapping unmanned aerial vehicle which comprises a vehicle body, a protection box fixedly installed at the bottom of the vehicle body, two dustproof nets fixedly installed in the protection box, a supporting frame arranged in the vehicle body, a telescopic groove formed in the supporting frame, a telescopic rod connected in the telescopic groove in a sliding mode, and a motor connected with the telescopic rod in a sliding mode. And a damper is fixedly mounted at one end of the telescopic rod. According to the quadrotor surveying and mapping unmanned aerial vehicle provided by the utility model, the surveying and mapping device is protected through the protection box, so that flying insects are prevented from colliding with a lens of the surveying and mapping device to cause damage in the flying process of the vehicle body, and meanwhile, blown dust or broken stones and the like are blocked when the vehicle body descends; and meanwhile, through cooperation w