Yes, he can absolutely take all of the money. So could you. I know hindsight is 20/20, but why didn't you get separate accounts when you filed for divorce? You need to protect yourself and your kids, and the agreements made when things are good quickly dissolve when things get rough.
First things first, remove the remainder of the money from your checking account and put it in an account in your name only. Do the same with your savings if you haven't already. Then please look at all of the other things you hold in common and ensure that he can't sell your house, your car, or anything else out from under you. (if your deeds say Jennifer AND Bob, then usually both signatures are required. But if they say Jennifer OR Bob, only one person needs to sign in order to sell something).
Most importantly, talk to your lawyer about getting a provisional support agreement IMMEDIATELY. That means that your soon-to-be-ex would need to pay child support and maybe spousal support in advance of your divorce. There's no reason why you have to go through your savings or operate on only $220 just because that's all that's left in the account. You need to get the court to require him to start paying support now, not after the divorce. Don't just operate on a promise... get it in writing and make it legal.