Is it good to do mba from non-accredited B-school. or accreditation play very important role.

Yes, it's very important. There's a big difference in the experience and outcomes.

Thnx Duncan.But is it good to do MBA from accredited(AACSB,AMBA etc.)Business school which are located in Asia or will it bee good to complete it from any college or university of UK which is non-accredited.

It's much, much better to do it from an AACSB or AMBA school in Asia than from an UK university which does not have international accreditation. With accreditation you know that you have a comprehensive curriculum, strong classmates, great facilities and a the strong international brand of AACSB, AMBA or EQUIS. Without it, you will have less teaching, less rigour, classmates with less - or no - work experience, poor facilities and very different outcomes with employers.

And even worse than an unaccredited university will be a private college whose MBA is validated by an unaccredited university. At least at a university you'll have a real library.

Thnx allot for the help Duncan.