The utility model provides a miniature folding lady's hat which comprises a group of frames and a hat surface, wherein, the frames are rotatablely connected through pins, and the hat surface is made of a flexible material. A hat top which is bended into an arch shape according to a person's head is arranged at one end of the frame near to the pin, the other end is an arc-shaped hat brim which has a non-concentric circle relation with the hat top, and the internal arc surface of the arch-shaped hat brim is upward or downward. The head surface is installed fixedly or detachably on the frame; if the frame is deployed 360 DEG and the head and the tail is connected into a hat; if the frame is slightly deployed, a fan is formed; if the frame is folded, the frame can be put in a pocket or a small portable bag. In addition, the hat surface can be exchanged at any time according to a using situation or different seasons.