最近好像不少人都在这里问 移民局的文件在这里 http://www.uscis.gov/files/article/afm_ch22_091206R.pdf page 27说了 (1) Determining the Priority Date. In general, if a petition is supported by an individual labor certification issued by DOL, the priority date is the earliest date upon which the labor certification application was filed with DOL. In those cases where the alien’s priority date is established by the filing of the labor certification, once the alien’s Form I-140 petition has been approved, the alien beneficiary retains his or her priority date as established by the filing of the labor certification for any future Form I- 140 petitions, unless the previously approved Form I-140 petition has been revoked because of fraud or willful misrepresentation. This includes cases where a change of employer has occurred; however, the new employer must obtain a new labor certification if the classification requested requires a labor certification (see the section on successor in interest). 所以说,只要你的上一个140没作假,那么你的pd就是可以带走的