Automatic hair curler

An automatic hair curler, comprising:

• a handle, inside which a drive motor is arranged;
• a housing, which is a tubular structure, with one end that is connected to the handle, wherein one hair-passing hole and one bar-shaped hole are opened on an outer wall of the housing and arranged opposite to each other, and extend in a lengthwise direction of the housing, a first via hole is arranged on one side of the bar-shaped hole on the outer wall of the housing, extends in a circumferential direction of the housing, and has one end that is in communication with a tail end of the bar-shaped hole;
• a curling iron, which is arranged inside the housing, and has one end that is connected to the drive motor and the other end on which one hair-clipping opening is opened, wherein the hair-clipping opening extends in the lengthwise direction of the curling iron;
• and
• a heating passage, which is arranged on the handle and threaded into the housing for heating hair.