The invention relates to a method for evaluating a favorable reservoir formation zone of an ancient buried hill. The evaluation method comprises the following steps: determining a zone where high-quality source rock develops in a basin and a stratum position where the high-quality source rock is located; determining the main hydrocarbon expulsion threshold depth of the high-quality source rock; determining the current ancient buried hill structure characteristics of the basin according to the seismic profile structure interpretation result; constructing evolution profiles of the basin in different periods to research the evolution history of the ancient buried hill, determining the thickness of the layer, in lateral contact with the ancient buried hill, of the high-quality source rock contained in the depth range of the main hydrocarbon expulsion threshold, determining the lateral contact time of the high-quality source rock in different layers and the ancient buried hill, and establishing the reservoir forming probability of the ancient buried hill and favorable zone optimization. According to the evaluation method, the reservoir forming probability of the ancient buried hill is evaluated by researching the effective contact area and time period of the ancient buried hill and high-quality source rock according to the development characteristics of the ancient buried hill in different structural evolution periods in combination with the main hydrocarbon expulsion threshold depth of the high-quality source rock, so that optimal evaluation of the basin ancient buried hill iscarried out.