Disclosed are tent frames, and centralized locking and unlocking mechanisms for tent frames. A centralized locking mechanism includes a slider coupled with the first connector movably disposed on a central pole, and a fastening assembly coupled with the slider. The fastening assembly includes a fastener configured to selectively couple the second hole of the slider with the first restricting hole of the central pole and thus restrict the slider from moving along the central pole, and decouple the second hole of the slider from the first restricting hole of the central pole and thus allow the slider to move along the central pole. An unlocking mechanism is disposed at the lower end of the central pole for selectively unlocking the centralized locking mechanism.