The invention relates to a turnover-type headrest and a headrest attitude control support capable of improving comfort of the turnover-type headrest of a car seat. The headrest attitude control support comprises a part matching portion, two symmetrical headrest lock portions, and a headrest rod mounting groove arranged between the part matching portion and the headrest lock portions to form the integrally-structured headrest attitude control support. A plurality of lock plate matching slots are formed in each headrest lock portion, and spring matching slots are formed at the contact ends of the headrest rod mounting grooves with the part matching portion. The turnover-type headrest comprises the headrest attitude control support, a headrest rod, a button return spring piece, a button, a button spring, a button box, bolts, a rear headrest housing, a headrest lock plate, a lock plate pushing spring, a front headrest housing and a headrest return spring. The turnover-type headrest can be adjusted in gear and attitude according to the customers' requirements on comfort, and meanwhile, locking of attitude can be ensured during function release of turnover-type headrest, so as to avoid shaking and abnormal sound of the headrest.