Red Wall MP Richard Holden has written the letter to the Treasury — co-signed by 102 MPs.
Ex-Cabinet ministers Sir Iain Duncan Smith, Alun Cairns and Karen Bradley as well as fellow red-wallers Dehenna Davison and Paul Howell also back a reduction.
Mr Holden said: "A cut will not only significantly bolster our much-loved pubs, but also have great knock-on effects for British agriculture and employment."
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Another 60 MPs from the Tories, Labour and Lib Dems have also written to Mr Sunak wanting VAT slashed on pub food and drink.
The Chancellor is carrying out a review on alcohol tax and is considering cutting it for beer from kegs and sparkling English wine to protect pubs and boost home-grown drink exports.
It comes after he was given pre-Budget wriggle room as new figures showed Britain borrowed less money than expected last month.
Government borrowing fell to £21.8billion in September, from £28.8billion in the same month a year earlier.