回复：急!!! 登陆加拿大返美需签证否？高手们，请赐教。

No, you don't need to have a visa. You'll need to bring the following:

(1) passport valid for at least 6 months
(2) original H1-B approval (I-797)

When you enter Canada, make sure you do not surrender you current I-94. You'll need it to come back into the U.S.

You do need a visa from the Canadian consulate to enter Canada - assume you know this already.