http://www.cic.gc.ca/english/information/faq/work/index.asp said:
Can my spouse or common-law partner work in Canada?
If your spouse or common-law partner wants to work while in Canada, they must apply for their own work permit. Normally, they must meet the same requirements that you do, including obtaining (if needed) a labour market opinion from Human Resources and Skills Development Canada.
However, your spouse or common-law partner may be eligible to apply for an “open” work permit that will allow her or him to accept any job with any employer if you meet the conditions outlined below.
A. You are authorized to work in Canada for six months or longer and the work you are doing while you live in Canada meets a minimum skill level (usually work that would require at least a college diploma). Specifically, your job must be listed in Skill Level 0, A or B in the National Occupational Classification.
Note: If you are the holder of a Post-Graduation Work Permit, which is a type of open work permit, your spouse will need to attach a copy of your work permit to his or her application for an open work permit. Your spouse will also need to provide information about your employment by attaching supporting documents, including:
A letter from your current employer confirming employment or a copy of your employment offer or contract; AND
A copy of one of your pay slips.
Or
B. You are authorized to work in Canada and your spouse or common-law partner is eligible for a work permit through an active pilot project. Find out more.
In each of the above cases, your spouse’s permit will be valid for the same period as yours.
If you meet these requirements, your spouse may apply for an open work permit. Your spouse’s permit will be valid for the same period as your authorization to work in Canada. If your job does not fall within the categories listed above, your spouse may still apply for a work permit, but it will have to be for a specific job and in most cases, the employer will have to obtain a labour market opinion (the normal authorization required for the employer to hire you) from Human Resources and Skills Development Canada.
In some cases, your spouse or partner will need a medical examination.
If they have not already applied overseas, spouses and partners may apply for their work permit from within Canada.
