A multi-rotor small unmanned aerial vehicle, comprising: a tri-axis platform, comprising: a dual-axis platform, comprising a machine frame assembly and a transmission assembly, the machine frame assembly comprises a first bracket , a second bracket and a third bracket , wherein the first bracket is configured to fix a shooting assembly , the first bracket is rotatably arranged with the second bracket , and the second bracket is rotatably arranged with the third bracket , the transmission assembly comprises a first motor and a second motor , wherein the first motor is configured to directly drive the first bracket to rotate relative to the second bracket , and the second motor is configured to directly drive the second bracket to rotate relative to the third bracket , wherein the transmission assembly further comprises a third motor , the machine frame assembly further comprises a connecting frame for fixing externally, and the third motor is configured to directly drive the third bracket to rotate relative to the connecting frame ; and characterized in comprising a multi-rotor mounting frame , the multi-rotor mounting frame comprising: a support frame ; a base on which the connecting frame is fixed; a plurality of support arms fixedly arranged on the base ; and rotor members disposed on the support arms . a tri-axis platform, comprising: a dual-axis platform, comprising a machine frame assembly and a transmission assembly, the machine frame assembly comprises a first bracket , a second bracket and a third bracket , wherein the first bracket is configured to fix a shooting assembly , the first bracket is rotatably arranged with the second bracket , and the second bracket is rotatably arranged with the third bracket , the transmission assembly comprises a first motor and a second motor , wherein the first motor is configured to directly drive the first bracket to rotate relative to the second bracket , and the second motor is configured to directly drive the second bracket to rotate relative to the third bracket , wherein the transmission assembly further comprises a third motor , the machine frame assembly further comprises a connecting frame for fixing externally, and the third motor is configured to directly drive the third bracket to rotate relative to the connecting frame ; a dual-axis platform, comprising a machine frame assembly and a transmission assembly, the machine frame assembly comprises a first bracket , a second bracket and a third bracket , wherein the first bracket is configured to fix a shooting assembly , the first bracket is rotatably arranged with the second bracket , and the second bracket is rotatably arranged with the third bracket , the transmission assembly comprises a first motor and a second motor , wherein the first motor is configured to directly drive the first bracket to rotate relative to the second bracket , and the second motor is configured to directly drive the second bracket to rotate relative to the third bracket , wherein the transmission assembly further comprises a third motor , the machine frame assembly further comprises a connecting frame for fixing externally, and the third motor is configured to directly drive the third bracket to rotate relative to the connecting frame ; and characterized in comprising a multi-rotor mounting frame , the multi-rotor mounting frame comprising: a support frame ; a base on which the connecting frame is fixed; a plurality of support arms fixedly arranged on the base ; and rotor members disposed on the support arms . a support frame ; a base on which the connecting frame is fixed; a plurality of support arms fixedly arranged on the base ; and rotor members disposed on the support arms . <EOS>