A support assembly of an above-ground pool, the support assembly comprising: a plurality of horizontal support members; a plurality of vertical support members; a plurality of first connecting members, each connecting an upper end of one of the plurality of vertical support members to two of the plurality of horizontal support members; and a plurality of second connecting members, each connecting a lower end of one of the plurality of vertical support members to a base of an above-ground pool; wherein each of the plurality of first connection members comprises a first insertion slot having a shape corresponding to a contour of the one of the plurality of vertical support members and a first receiving groove configured to accommodate therein an upper edge of a surrounding wall of the above-ground pool, and wherein each of the plurality of second connecting members comprises a second insertion slot having a shape corresponding to the contour of the one of the plurality of vertical support members and a second receiving groove configured to accommodate therein a lower edge of said surrounding wall, wherein each first connecting member comprises: a connecting member body comprising the first insertion slot, said first receiving groove and a clamping tongue, with the first receiving groove and the first insertion slot located on the same side of the connecting member body, a protective cover configured to be fixed to the connecting member body by clamping and comprising a clamping hook joined to the clamping tongue. a plurality of horizontal support members; a plurality of vertical support members; a plurality of first connecting members, each connecting an upper end of one of the plurality of vertical support members to two of the plurality of horizontal support members; and a plurality of second connecting members, each connecting a lower end of one of the plurality of vertical support members to a base of an above-ground pool; wherein each of the plurality of first connection members comprises a first insertion slot having a shape corresponding to a contour of the one of the plurality of vertical support members and a first receiving groove configured to accommodate therein an upper edge of a surrounding wall of the above-ground pool, and wherein each of the plurality of second connecting members comprises a second insertion slot having a shape corresponding to the contour of the one of the plurality of vertical support members and a second receiving groove configured to accommodate therein a lower edge of said surrounding wall, wherein each first connecting member comprises: a connecting member body comprising the first insertion slot, said first receiving groove and a clamping tongue, with the first receiving groove and the first insertion slot located on the same side of the connecting member body, a protective cover configured to be fixed to the connecting member body by clamping and comprising a clamping hook joined to the clamping tongue. a connecting member body comprising the first insertion slot, said first receiving groove and a clamping tongue, with the first receiving groove and the first insertion slot located on the same side of the connecting member body, a protective cover configured to be fixed to the connecting member body by clamping and comprising a clamping hook joined to the clamping tongue.