My baby is 8.5 months old and from thr last 3 months....he wakes up many times in night crying out . After feeding him he still wakes up after sometime.

i think your baby needs more solids now, especially as this is a super fast growing phase. try bringing down meal time closer to bedtime. also, if your baby does wake up at night, don't start talking or playing. instead, tell your baby repeatedly that it is good night time and that you all have to sleep.