This model restores the structural form of Hong Kong Tsing Ma Bridge, a typical double-deck highway-railway combined suspension bridge. The main bridge adopts a three-frame reinforced concrete bridge tower design, matched with main suspension cables and dense vertical suspender layout; the upper deck is a six-lane urban highway for automobile and bus traffic, the lower layer reserves railway traffic passage, equipped with road guardrails, isolation barriers, urban street lamps and various traffic vehicle models. It can be applied to bridge engineering bidding display, traffic infrastructure design demonstration, civil engineering teaching display, transportation construction project publicity and urban landmark architectural presentation.