Multi-rotor type aircraft, aircraft arm clamping device and clamping mechanism

The invention relates to a multi-rotor type aircraft which comprises an aircraft body, aircraft arms and an aircraft arm clamping device, wherein each aircraft arm comprises a free end and a fixed end which are oppositely arranged; the aircraft arm clamping device comprises clamping mechanisms connected with the aircraft body; each clamping mechanism comprises a clamping part, a pressing block and a locking part; each clamping part comprises an outer side face, a positioning through hole, a gap for penetrating through and separating off the outer side face as well as two recesses formed in the inner surface of the positioning through hole; each gap is communicated with the corresponding positioning through hole; the two recesses are respectively formed in two opposite ends of the corresponding gap and are respectively communicated with the corresponding gap and the corresponding positioning through hole; the fixed end of each aircraft arm is arranged in the corresponding positioning through hole in a penetrating manner; each pressing block comprises a matrix and a pressing part which is outwards protruded from the matrix; each pressing part is matched with the corresponding gap; each locking part penetrates through the corresponding pressing block and is locked on the corresponding outer side face, so that the pressing part can be arranged in the corresponding gap in a detaching detachable manner and is supported against the fixed end of the corresponding aircraft arm. The invention also provides the aircraft arm clamping device for fixing the aircraft arms and the clamping mechanism.