The invention discloses a fractional thrown firefighting ball mount part and an unmanned aerial vehicle and belongs to the technical field of firefighting equipment. The fractional thrown firefightingball mount part comprises a main bearing frame, a plurality of holding frame assemblies arranged in the circumferential direction of the main bearing frame, a motor assembly fixedly arranged on the main bearing frame and a ratchet seat assembly. The holding frame assembly comprises a first holding frame and a second holding frame which are rotatably connected with the main bearing frame, and theratchet seat assembly comprises a ratchet fixing seat and a rotating seat. The ratchet fixing seat is fixedly arranged on the main bearing frame, the rotating seat is rotatably arranged on the ratchetfixing seat, and locking claws are further fixedly arranged on the positions, corresponding to all the holding frame assemblies, of the ratchet fixing seat. The rotating seat is rotatably connected with the output end of the motor assembly, and an unlocking column is further fixedly arranged in the circumferential direction of the rotating seat. According to the fractional thrown firefighting ball mount part and the unmanned aerial vehicle, the function of firefighting ball fractional throwing is achieved.