The invention discloses a method for pre-distributing aircraft berths in an airport. The method comprises the following step of distributing the berths by adopting a score penalty distribution method, wherein a score penalty range is a closed interval from 0 to 100 scores, the 100 scores represent that an aircraft cannot berth, the 0 score represents that the berth is most suitable for berthing, other scores represent different precedence orders, and a low score has a priority; score penalty standards comprise fixed score penalty and scheduled flight conflict score penalty; the fixed score penalty comprises type score penalty, airline company score penalty, international and national type score penalty and far and near berth score penalty; and a rule of the scheduled flight conflict score penalty is that when two airports are berthed at the same position, the conflict score penalty is 100 scores, and when the interval time is longer than the station-crossing shortest guarantee time, the score penalty is 0 score, wherein a score penalty calculation formula is that score=0.2*n^2, and n is a minute difference value of the interval time and the shortest guarantee time. According to the method disclosed by the invention, the berths of the airports can be intelligently distributed by a procedure, and actual utilization requirements are met.