The present invention provides a power assembly, including: a motor, a fixing base and a propeller. The fixing base is sleeved over a motor rotation shaft and is fastened to a base body of the motor, and the fixing base is provided with a first clamping portion. The propeller includes a base portion and a blade extending from the base portion, and the base portion is provided with a second clamping portion clamped to the first clamping portion. The propeller is detachably connected to the motor by engaging the first clamping portion with the second clamping portion, so that the propeller can be effectively prevented from loosening from the motor during the vibration or acceleration, and is easy to disassemble/assemble and carry.