The invention discloses a headrest skeleton mechanism convenient to fold, which comprises a headrest pole, a headrest support, a folding rotating shaft, a fixed plate, a folding button, a headrest base skeleton, an unlocking support, a locking plate, an unlocking rotating shaft and a linkage pin, when being pressed down, the folding button is used for compressing a button returning spring, the end of the folding button pushes the unlocking support to rotate around the axis of a mounting column and applies acting force to a reset spring of the unlocking support, an unlocking shifting plate pushes the linkage pin to upward move along a strip-shaped slot, the linkage pin drives the locking plate to rotate around the unlocking rotating shaft and applies acting force to the reset spring of the locking plate, finally, the locking part of the locking plate is withdrawn from a locking gap of the fixed plate, thus realizing unlocking; then, the headrest support can be rotated around the folding rotating shaft under the action of external force, so that the headrest skeleton can be folded. According to the headrest skeleton mechanism, the structure is simple, the number of parts is few, the structure is compact and the manufacturing cost is low.