h4签证能在美国工作么？
不能，H4持F1签证在移民法里是不允许工作的，不过一般没人查，而且你可以在申请的时候同时申请I797C，这是工作许可，但是一旦被拒就会被自动遣返回国. 还有，如果你是赴美产子的妈妈，那你在H4身份到期之前就必须离开美国，因为你是以非移民身份入境的，而且又是在美国非法生育，所以一旦逾期滞留就被认为非法移民了，而且你的宝宝也不会拿到公民身份的. 所以还是不要冒险哦~！ 在美国拿学生签证(F1)是不能在美国就业的，同样H1B也不可以，只有拿到了绿卡才可以就业，如果被发现将按移民法处理，严重的将被驱逐出境.
关于H1B和H4的问题可以参考这个： H1B： URL H4： URL h-4 visa holders can't work in the U.S.， but a new law has opened the door to changing that
By RENEE MONTAGNE， NPR
Updated August 29， 2013 5：06 PM
When it comes to immigration policy， President Obama often seems at odds with Congress. But on one point he and lawmakers are in sync： There is broad agreement they don’t like the practice of some companies hiring workers here illegally by giving them an H-4 visa to accompany their spouses who already have legal status as H-1Bs or H-2Bs. The visas were created so foreign guest workers could bring their families along to live here temporarily until their gigs ended.
A recent Senate hearing called for a crackdown on this abuse， which critics say undermines American workers seeking skilled jobs and hurts businesses trying to follow federal rules by legally bringing people into the country.
“It should not be acceptable practice for employers to use a loophole to circumvent laws designed to protect American workers，” Senate Judiciary Committee Chairman Patrick Leahy said after the hearing. “There must be consequences for breaking our employment laws.”
As part of his budget proposal， Obama suggested limiting such visas. That sparked protests from tech company CEOs. Facebook‘s Mark Zuckerberg posted about the issue on his page， calling it harmful to America. He added his views to comments submitted to the White House by several other Silicon Valley leaders．
On Monday， Homeland Security Secretary Jeh Johnson announced the department would propose regulations that would end the practice. An announcement came after months of internal deliberations and meetings between DHS officials and business executives over how best to crack down without hampering legitimate efforts to recruit immigrants. While the plan would limit H-4 usage to spouses of those here legally working under specialized visas， the move doesn’t directly target employers using illegal