The invention discloses a junk mail recognition method comprising the steps of extracting the text of a mail to be recognized, and performing word segmentation on same, thus acquiring an entry set ofthe mail to be recognized; recognizing noise characters in the entry set through combining with a pre-acquired standard word frequency table, and computing a proportion of the noise characters in theentry set; and judging whether the proportion of the noise characters is more than a preset noise character proportion threshold, and if yes, recognizing the mail to be recognized as a junk mail. According to the junk mail recognition method, the noise characters in the mail to be recognized are recognized according to the features of the noise characters, and the situation that whether the mail to be recognized is the junk mail is further recognized according to the noise characters included in the mail to be recognized, the implementation mode is simple, and the recognition accuracy of the junk mail is higher.