Changes went into effect earlier this year, but Alward says Ottawa didn't examine what the impact would be on seasonal workers and industries.
Alward says it's concerning that kind of examination wasn't done.
He says he will ask the Atlantic premiers to support his call for a moratorium when they meet next week in Nova Scotia.
Under some of the new rules, those who frequently claim EI need to prove they're actively seeking work, and will be required to take available jobs even if they pay less than their previous work.
Human Resources Minister Diane Finley has said the changes will better connect Canadians with available jobs in their area.
The government estimates the changes will save $12.5 million this year and $33 million next year.