The utility model discloses a curtain hook stable in positioning, which relates to the field of curtain hooks and comprises a buckle, a circular ring is butted below the buckle, and a connecting table is arranged below the circular ring. A clamping groove is formed in the buckle, a sliding mechanism is arranged in the clamping groove, the sliding mechanism comprises a rolling wheel, and the rolling wheel is arranged in the clamping groove; a connecting table is arranged below the circular ring, a positioning mechanism is arranged below the connecting table, the positioning mechanism comprises a damping rod, the damping rod is arranged in the connecting table, and one end of the damping rod penetrates through the connecting table. According to the curtain hook stable in positioning, the positioning mechanism is arranged below the connecting table, when the curtain hook and a curtain are fixed, the clamping plates are pushed to the side close to the connecting table, at the moment, the reset spring is compressed, the curtain is placed between the two clamping plates, at the moment, the reset spring resets to enable the clamping plates to clamp the curtain, and anti-skid protruding blocks are arranged on the inner sides of the clamping plates; and the curtain can be more stably fixed by the clamping plates.