The invention provides a reasonable liquid extracting method specific to a roof ridge fault block oil reservoir. The reasonable liquid extracting method specific to the roof ridge fault block oil reservoir comprises the steps that 1, according to the geological parameters and the exploitation stage of an oil reservoir, the roof ridge fault block oil reservoir where a liquid extracting measure can be conducted is determined; 2, exploitation condition analysis is conducted on the selected oil reservoir, and the current open oil-water well condition is mainly analyzed; and 3, according to the actual conditions of the oil reservoir, the technical policies such as the liquid extracting range, the liquid extracting mode, oil reservoir average formation pressure keeping level for conducting the liquid extracting measure are determined. Through the reasonable liquid extracting method specific to the roof ridge fault block oil reservoir, timely and reasonable liquid extracting for the roof ridge fault block oil reservoir can be effectively guided, and technical support is provided for keeping the stable yield and improving the development effect for the roof ridge fault block oil reservoir in an ultrahigh water-cut stage.