This paper aims to investigate the selection strategy of the bottom formwork support system for the integral cast-in-place construction of a long-span and continuous inclined beam of overhead-erection ramp wharf in the green port service demonstration area project in Xingshan County，Yichang City. It takes into account the influence of water level operation in the Three Gorges Reservoir area and the construction conditions without large crane ships. After comparing different schemes of the bottom formwork support system，this paper proposes a scheme，i.e.，the integral cast-in-place construction of a deck-type positive support structure with the combination of steel embedded parts at both ends and intermediate support. The determination，design and construction technology are also introduced regarding this scheme. The results show that the proposed scheme is feasible in practice，which can overcome the horizontal thrust generated during integral cast-in-place construction of inclined beams and guarantee the quality and safety of the project.