The invention provides an oil recovery factor calibration auxiliary device and auxiliary method. The oil recovery factor calibration auxiliary device comprises an analogy oil deposit information storage part, a target oil deposit information obtaining part, an analogy oil deposit primary selection part, an oil deposit similarity calculation part, an analogy oil deposit final selection part and a final selection analogy oil deposit informing part. The analogy oil deposit information storage part stores an analogy oil deposit database, and in the analogy oil deposit database, information of a plurality of oil deposit feature parameters is stored aiming at various pre-set analogy oil deposits. The target oil deposit information obtaining part obtains the known information of the various oil deposit feature parameters aiming at a target oil deposit. The analogy oil deposit primary selection part is used for selecting primary selection analogy oil deposits from the analogy oil deposits based on the information of the target oil deposit. The oil deposit similarity calculation part is used for calculating the similarity between the primary selection analogy oil deposits and the target oil deposit. The analogy oil deposit final selection part is used for selecting a primary selection analogy oil deposit from the primary selection analogy oil deposits as a final selection analogy oil deposit according to the similarity between the primary selection analogy oil deposits and the target oil deposit, wherein the similarity between the selected primary selection analogy oil deposit and the target oil deposit is larger than a preset value, and the similarity between the primary selection analogy oil deposits and the target oil deposit is calculated by the oil deposit similarity calculation part. The final selection analogy oil deposit informing part is used for informing the final selection analogy oil deposit selected by the analogy oil deposit final selection part.