Portable multifunctional folding chair

The invention provides a portable multifunctional folding chair, which comprises a chair back, a seat, chair legs and a folding structure element, wherein the chair back is connected with one side of the seat through the folding structure element; the angle between the chair back and the seat can be adjusted; the chair back can be turned over and can be flush with the seat; the chair legs are arranged at the bottom of the seat in a foldable manner; the chair legs are forked when being opened; the chair back comprises a chair back surface and a chair back frame; an angle between the chair back surface and the chair back frame can be adjusted through a hinge element; the chair back surface can be used as a desktop to form a desk and a chair; and an inclination angle between the chair back surface and the chair back frame can be adjusted according to the habits of different users. The portable multifunctional folding chair provided by the invention can be used as a single chair, can also be used as two stools, and can also be integrally used as the desk and the chair; and the folding chair is simple in structure, diverse in function, small in floor area after being folded, and convenient to carry.