The lift-surface dual-use vertical take-off and landing (LSDU-VTOL) configuration significantly reduces disk loading by utilizing a large rotor disk radius, providing an efficient pathway for VTOL technology. However, this technology remains in the conceptual validation stage, as several technical barriers have yet to be overcome. This paper reviews the key research topics of the LSDU-VTOL and identifies three major technical challenges: passive spin stability control, high-spin rate attitude resolution algorithms, and pitch-flap coupling issues. By analysing the current state of research, this paper identifies potential breakthroughs for the configuration and explores its broad application prospects in the field of small unmanned aerial vehicles (UAVs).