At present，the commonly used evaluation indexes for water-flooding development effect are mostly related to the evaluation of the entire reservoir development history，which are difficult to timely reflect the matching degree of the current well pattern and the injection-production pressure system with the reservoir state. Therefore，in view of the nature of the underground flow field evolution in water-flooding reservoirs，the oil saturation and flow velocity are screened out as seepage field evaluation parameters by the logic analysis method. In light of the statistical theory，an evaluation model of flow field adaptability is established with four indexes，including relative adaptation coefficient，flow-saturation difference（FSD），absolute adaptation coefficient，and equilibrium coefficient. With typical injection-production units and actual blocks as examples，the flow field adaptability is evaluated. The analysis results show that the equilibrium coefficient and the actual daily oil production are correlated positively. The developed evaluation model of flow field adaptability can effectively warn the imbalance between the development system and the reservoir state and intuitively reflect unreasonable positions in the area，thus able to guide the adjustment of injection and production，quantitatively evaluate the effectiveness of various adjustment measures，and provide technical support for the following development and adjustment of water-flooding reservoirs.