While i was playing badminton, suddenly i had severe back pain which makes me difficult to stand and walk. no pain while in supine or prone position. but i couldnt get up and walk?

Yeap! you have pulled a muscle and you need to rest and take it easy doing careful pullup exercises and taking anti inflammatories. This is the time for a good physiotherapist or even a Chiropractor.

The motion in playing badminton is different than tennis. Your arm motion is higher than tennis and your back is stretching forward, possible causing muscle strain and pulling. Wear a back brace when playing and hot compresses on back afterwards.