Variable-diameter curling iron

The utility model provides a variable-diameter curling iron, and belongs to the technical field of hairdressing tools. The problem that the diameter of an existing curling iron cannot be changed is solved. The variable-diameter curling iron comprises a heating rod body, the heating rod body is provided with a handle for people to grasp, a containing cavity is formed in the heating rod body, a driving device is arranged in the heating rod body, the heating rod body comprises a plurality of first heating pieces and a plurality of second heating pieces, and the driving device is used for driving the heating rod body to be unfolded or folded. The adjacent first heating pieces are connected through second heating pieces, when the heating rod body is folded, the adjacent first heating pieces abut against each other, and the second heating pieces are located in the containing cavity. The hair curling iron has the advantages of being capable of changing the diameter of the hair curling iron and the like. 本实用新型提供了一种可变