畜禽肉类（Meats, Livestock and Poultry）。不论是新鲜的、干燥的、罐头的、真空包装的，都是禁止的。
特别提醒：
1）如果带了食物，一定要在表格中申报，你会被检查，通常这个检查跟其他行李的检查一样简单，仅仅是过一下扫描。
2）一些食物是不许带入的。但是如果你已经提前申报的话，仅仅是没收这些食物。
3）如果没有申报而携带了违禁品的话，那么就可能会被处罚。
水果和蔬菜（Fruits and Vegetables）。
植物和种子（Plants and Seeds）。
泥土（Soil）。
生物制品（Biologicals
药物（Medication）。可以携带你所需要的药物（take the medicines you will need），但只能是个人合理用量。此外，麻醉剂和其他可能会滥用的药物是禁止的。
陶制餐具（Ceramic Tableware）。
文化遗产物品（Cultural Artifacts and Cultural Property）。
受知识产权保护的物品（Trademarked and Copyrighted Articles）。
狗皮和猫皮（Dog and Cat Fur）。
那宠物能不能带呢？比如狗啊、猫啊。可以。但是，在海关得进行严格的检查，包括审查所有的疫苗接种记录和健康证书。夏威夷特别严格，所有的宠物进夏威夷（包括从美国大陆进夏威夷），都得经过检疫（quarantine），“隔离审查”，费用为数百美元，若检疫期是120天的话，费用是1080美元。你如果实在舍不得心爱的宝贝，就只得花这笔隔离审查费了。
黄金（Gold）。金币、金条，以前是禁止的，现在可以携带了。但是，没有发行国家名字的金币是不可携带进美国的。
现金如果超过1万美元，得申报。
​武器弹药，
刀具，如水果刀、剃须刀、大剪刀（有金属尖头，刀刃长于4英寸）。
液体，如饮料、香波、牙膏。饮料在安全检查（Security check）前得喝完。其他的液体物品，如料酒、米醋、麻油，都可以随行李托运，但绝对不准随身携带。牙膏可以带旅行用的，容量不超过3.4盎司。
色情的东西

https://www.cbp.gov/travel/international-visitors/know-before-you-go
https://www.cbp.gov/travel/us-citizens/know-before-you-go/prohibited-and-restricted-items


Prohibited and Restricted Items
CBP has been entrusted with enforcing hundreds of laws for 40 other government agencies, such as the U.S. Fish and Wildlife Service, the U.S. Department of Agriculture and the Centers for Disease Control and Prevention. These agencies require that unsafe items are not allowed to enter the United States. CBP officers are always at ports of entry and assume the responsibility of protecting America from all threats.
The products CBP prevent from entering the United States are those that would injure community health, public safety, American workers, children, or domestic plant and animal life, or those that would defeat our national interests. Sometimes the products that cause injury, or have the potential to do so, may seem fairly innocent. But, as you will see from the material that follows, appearances can be deceiving.
Before you leave for your trip abroad, you might want to talk to CBP about the items you plan to bring back to be sure they're not prohibited or restricted. Prohibited means the item is forbidden by law to enter the United States. Examples of prohibited items are dangerous toys, cars that don't protect their occupants in a crash, bush meat, or illegal substances like absinthe and Rohypnol. Restricted means that special licenses or permits are required from a federal agency before the item is allowed to enter the United States. Examples of restricted items include firearms, certain fruits and vegetables, animal products, animal by products, and some animals.



​

荤的，超过一万美金的现金

中药最好不要带，有些成分的禁止过关的

动物植物不行药品需要外包装

太多了。你就说你想带神马吧。

太多了

尽量别带肉制品