The invention relates to the field of safety equipment, in particular to a rotating part safety warning device and a rotating paddle. The rotating part safety warning device is used for warning of a rotating part body in a rotating state and comprises a warning light generator and a controlling module which are arranged on the rotating part body. The warning light generator is used for emitting warning light with a predetermined color and a predetermined flickering period, and the controlling module is used for controlling starting and shutdown of the warning light generator and controlling the predetermined flickering period by controlling starting and shutdown frequency of the warning light generator. According to the rotating part safety warning device and the rotating paddle, the warning light generator can emit the warning light with the predetermined color and the predetermined flickering period in a controlled mode for warning when the rotating part body is in the rotating state, the warning effect is more obvious, and safety performance is improved.