Abstract: The present invention discloses a mini hair curler, including: a main body, a styling comb, and a hair winding assembly formed by two D-shaped structures fastened to each other. A driving motor is disposed inside the main body, and a rear end of the hair winding assembly is connected to the driving motor by using a rotating shaft. Two sides of a rear end of the styling comb are pivotally connected to two sides of a rear half portion of the main body, and the styling comb is capable of being opened or closed relative to the hair winding assembly, to clamp or release hair. The hair winding assembly of the hair curler is formed by the two D-shaped structures fastened to each other. That is, the hair winding assembly includes both an arc-shaped part and a flat part. Hair may be curled or wound at different parts as required, to implement straightening, curling, or a combination of straightening and curling of the hair, thereby achieving abundant shaping effects.