I have an iphone, but I want to put in two SIM cards, what should I do?

In my daily work, I need to separate it from my famliy.But, it won't be convient to carry two phones. I want to have two SIM cards in one phone, is there anything can help me?

Nope sorry, you have to consider using the same phone for your family and work. Or carry two phones with you.

Change the tone of work numbers?
Or put your phone on sleep mode and put your work contacts or your family contacts as favorite, so only those numbers will be heard around the specific time you'd like.

There are phones that can have two sim cards, but I don't think an iPhone is one of them.

According to your profile you are a phone EXPERT! LOL

Nothing you could do there. IPhones are all single SIM phones.