The invention discloses a rotating shaft assembly of a folding table lamp. The rotating shaft assembly comprises a rotating shaft and a rotating shaft seat, wherein the rotating shaft is rotatably connected with a lamp body and a connecting head of a table lamp, one end of the rotating shaft is fastened and connected in a shell of the connecting head, the rotating shaft seat is fastened and connected in a shell of a lamp body, and the other end of the rotating shaft is inserted into the rotating shaft seat in restricted axial movement and limited rotation manners; and the rotating shaft is provided with a through hole correspondingly matched with the rotating shaft, a shaft shoulder protrudes on the outer wall of the rotating shaft, and an elastic gasket is abutted between the shaft shoulder and the rotating shaft seat. According to the rotating shaft assembly, the lamp body and the connecting head of the table lamp can be randomly, fixedly and rotatably connected, and meanwhile, the rotating range can be limited.