A top support structure of tent frame includes a top pivoted holder (1), to which a plurality of support poles (10) are pivotally coupled. A flexible body (9) is set between each support pole and the top pivoted holder. The flexible body folds and stores elasticity energy when the tent frame is folded and automatically shoots the support poles when the elasticity energy is released. A control holder (2) is pivotally coupled to the bottom of the top pivoted holder, and the cotrol holder has lock pieces (211) which can prop the support poles up to limit their rotation and release grooves (212) adjacent to the lock pieces which can release the limitation. On the top of pivoted grooves (12) of the pivoted holder are set position-limited devices (D) to prevent the support poles from rotating upwards.