How Do I Loose Weight After Birth Of My Twin Girl ?

First Congratulations !  I bet taking care of them will help you lose some to begin with.  as you recover from birth I would do simple stuff.. Like walking when they are old enough put them in a stroller and go..  Calorie counting is a big part of diet but If you breast feed you need more calories.  
Don't sweat the diet to much just Love and enjoy the babies and get a little exercise and eat healthy and you should go back to normal.

Good Luck.. And congrats again. TWINS.. Wow :)

That is such happy news.  I am sure after having a baby your abs are the main focus.  do some crunches.  focus on keeping your back semi- straight.  you want your shoulderblades to come off the ground.  small dumbell weight-lifting can help too.  if you live somewhere with stairs try going up and down those a couple of times.  Swimming is a very good whole body muscle toner so this could help you lose pounds in a less strenuous way too. The water helps you to be weightless so it won't strain joints.  congratulations