The 19-year-old played six games in League One for the Railwaymen last season.
After an agreement was struck between the two clubs, he will go straight into contention for Saturday’s FA Trophy third qualifying round tie against Radcliffe.
On Evans’ arrival, Mariners boss Neil Young said: “Connor is a player who was put on my radar by someone whose opinion I respect.
“After watching footage of him and seeing him play live it was quickly apparent we had to do what we could to bring him to the club on loan.
“I would like to thank Crewe for allowing Connor to continue his development and get game time with ourselves.”
Photo credit: Crewe Alexandra
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