If he’s harboring any thoughts of challenging Gov. Cuomo next year, Mayor de Blasio would be well advised to shelve them, according to a poll Friday.

A Quinnipiac University poll found that even in his stronghold of New York City, Cuomo would clobber the mayor in a 2018 Democratic primary by grabbing 60 percent of the vote, to his 31 percent.

The results were so lopsided that even Democrats who consider themselves “very liberal” split , with 48 percent backing the progressive mayor and 46 percent going with the governor.

De Blasio and Cuomo have a tense relationship and 52 percent of voters believe their never-ending feud hurts the city.

More voters side with Cuomo (43 percent) than de Blasio (32 percent).

But most, 47 percent, think they have “honest disagreements” and just 35 percent say the feud is “personal.”

The poll of 822 likely New York City voters was taken Sept. 27 to Oct. 4.