What should be my major before Law School?
Law schools don’t care about your major. They care about your GPA. Do something you like and can do well in. It also wouldn’t hurt to double major or minor in something that provides you skills in case law doesn’t work out, unless your primary major already provides those.
If I am an international student, can I make an undergraduate law studies in the UK and the apply for the law school in the USA?
You can, but I’m not sure why you would. The undergrad law degree in the UK is the full law degree, allowing you to compete for a pupillage. You could then go on to a US law school if you wanted.
Law degrees, however, a fairly country-specific. A UK law degree will help you practice law in the UK, but not really anywhere else. Not even in the US, which is based on the UK’s legal system. Plus, unless you have US citizenship or a way to get it, the job prospects are remarkably slim. You’d need a visa that shows, among other things, that there is an extraordinary need for you. Since the US has a large oversupply of lawyers, that is very unlikely.
But isn’t it better to get a law degree from UK unviersity and after that get law degree from USA university than making an undergraduate par example economy studies for 4 years in the USA ? Thanks to that I would have two law degrees from two countries and ability to work in both of them.
As I said earlier, law schools do not care about your major. That means no, a UK law degree would not be better than an economics degree.
In your plan you would not be able to work in both the UK and the US. It is likely you could work in neither. Without a pupillage in the UK you cannot work, and you would miss out on one by going to the US for law school. In the US you need a visa to work, and it’s quite hard to get one for law. It’s not enough to know the curricula of law schools. Law is a regulated profession, which means you also need a license.