python pandas 列合并亲测可用 import pandas as pd df1 = pd.read_csv(u'input.csv', encoding='gbk') df2 = pd.read_csv('input1.csv', encoding='gbk') outfile = pd.merge(df1, df2, how='left', left_on=u'汉字井号',right_on='WELL') outfile.to_csv('outfile.csv', index=False, encoding='gbk')