Is it possible to get pr in canada while holding uk PSW(post study work visa)?

No. Merely having a three year degree does not qualify you to apply for permanent residency in Canada. Information for obtaining permanent residency in Canada is on the Citizenship and Immigration Canada web site.

You must meet the requirements for one of the categories before you can apply. If you are applying as a skilled worker you must have a skilled job offer in specific professions (doctor, engineer, nurse, specialized trades, etc.), at least one year's work experience in your professions, and 67 points based on your education, work experience, age, language testing, etc. Only the top 10,000 applications are accepted each year. The CIC web site includes a "Come to Canada" wizard which will give you a good idea if your education, skills, and experience are sufficient to qualify under any of the categories.

Yes, you can apply for Canada PR from UK. Canada PR is points based and requires at leat 1 year of Full time and Paid Experience. Please speak to your Immigration consultant for more information.

http://www.morevisas.com/visawizard/relocation-services-canada.

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