Social security transfer across provinces. Does the original social security card need to be cancelled?

It won't affect it, and it can be handled again after the transfer. Social insurance transfer process: after the insured establishes the basic old-age insurance relationship in the new employment place and pays the fee according to the regulations, the employer or the insured submits a written application for the transfer and continuation of the basic old-age insurance relationship to the social security agency in the new employment place; The social security agency of the newly insured place will review the application for transfer and continuation within 15 working days, send a consent letter to the social security agency where the insured person's original basic old-age insurance relationship is located, and provide relevant information; Do not meet the transfer conditions, make a written explanation to the applicant or the insured; Within 15 working days after receiving the acceptance letter, the social security agency where the original basic old-age insurance relationship is located shall handle all the transfer and connection procedures.