The former international cricket star was arrested at the weekend and whisked to jail after being found guilty in one of the more than 200 cases he has faced since being ousted from office by a vote of no confidence in April 2022.
Unless overturned, the conviction will rule him out of contesting upcoming elections.
Pakistan's election commission on Tuesday issued a statement officially disqualifying Khan for five years.
He is being held at a colonial-era prison on the outskirts of historical Attock city, around 60 kilometres (40 miles) west of the capital Islamabad.
"We've submitted an appeal... our plea requests a temporary suspension of the trial court's ruling and seeks bail," Khan's lawyer Gohar Khan said.
"The court will take up the case tomorrow and because the sentence is short we hope that Imran Khan will be granted bail in (several) weeks' time."
he people that I will not compromise on my principles'."