To improve the detecting precision, based on method of approximately duplicated records cleaning, each field of record is appointed a proper weight through using rank-based weights method in the process of approximately duplicated records detecting. 为了提高相似重复记录的检测精度,在相似重复记录检测算法的基础上,采用等级法为记录各字段指定合适的权重,从而提高了相似重复记录的检测精度。