The invention relates to a bundle-structured combined member. The bundle-structured combined member comprises a first member unit and a second member unit, wherein the first member unit comprises onefirst G steel member or two first G steel members arranged back to back; the second member unit comprises a second G steel member; the first G steel member and the second G steel member are of the same structure; each G steel member comprises a member bottom plate and two member side plates, and member wing plates are oppositely folded at the ends, away from the member bottom plate, of the two member side plates; opposite ends of the two member wing plates of the same G steel member fold inwards in the direction of the corresponding member bottom plate to form reinforced edges, so that the twomember wing plates form restrained edges; one member side plate of the second G steel member is a connecting side plate and fixedly connected with the corresponding member bottom plate or member sideplate of the first G steel member, and fixed assembly of the first member unit and the second member unit is realized. The reinforced edges serve as free edges, the corresponding wing plates serve assemi-restrained edges, the member side plates and the member bottom plate are full-restrained edges, and strength of the whole combined member is improved effectively.