A support apparatus and a foldable display terminal, which relate to the field of foldable display terminal technologies. The support apparatus includes a rotating mechanism, a first support portion, and a second support portion, where the first support portion includes a first support member, a first elastic member, and a first base plate, the first elastic member is connected between the first base plate and the first support member, and the first elastic member is elastically deformable to enable the first base plate to move in a direction close to or away from the rotating mechanism with respect to the first support member; and the second support portion and the first support portion are respectively disposed on two sides of the rotating mechanism, and the second support portion and the first support portion may be folded or unfolded opposite to each other.