F1校内打工是允许的，有时限。F1校外打工需要CPT。CPT 和 Intern 两回事情。

https://www.ice.gov/doclib/sevis/pdf/CurricularPracticalTraining.pdf

AI总结：

Yes, F-1 students can work in the United States, but there are certain restrictions and conditions: 

• On-campus work
• F-1 students can work on-campus up to 20 hours per week while school is in session, and up to 40 hours per week when classes are not. Students can apply for on-campus jobs up to 30 days before the start of classes. They will need to get a letter of approval from their DSO and their employer to apply for a Social Security Number. 
• Off-campus work
• F-1 students can't work off-campus during their first academic year. After that, they can work off-campus if they meet certain requirements, including: 
• Completing at least one academic year 
• Having an economic hardship that qualifies for the Department of Homeland Security's emergent circumstances 
• Getting approval from their DSO 
• Curricular Practical Training (CPT)
• F-1 students can participate in CPT during their program of study if the job is directly related to their major and is an integral part of the curriculum. 
• Optional Practical Training (OPT)
• F-1 students can participate in OPT during or after their program of study. OPT is a temporary employment option that is directly related to their program of study. 
• Working for an international organization
• F-1 students can work for a recognized international organization if they have a job offer and sponsorship from the organization. The organization must be on the State Department's list.