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我队友绿卡， 现在人已经在国内上班， 他的绿卡马上就要过期了， 准备放弃绿卡，就不要了， 我问我们需要给使馆填表申请吗， 还是过期就不renew就可以了， 谢谢！

-He needs to file I-407. See:

Abandonment of Status (Form I-407) - U.S. Embassy & Consulates in China (usembassy-china.org.cn)

 

After the abandonment is aprpoved, keep the approval document for future application for the visa (nonimmigrant visa or immigrant visa) and green card.