In Agents of S.H.I.E.L.D., Fury brought Coulson back to life using the T.A.H.I.T.I. project, which was meant to bring a dead Avenger back to life using GH-325, a drug derived from an ancient Kree corpse that S.H.I.E.L.D. had recovered in the past.

How did Coulson come back to life?

Agent Coulson was stabbed to death by Loki in The Avengers. But, he was brought back in Agents of S.H.I.E.L.D. when Nick Fury used the T.A.H.I.T.I. program to heal his wounds and bring him back to life.

How many times has Coulson died?

Once they reunited with the team, Simmons made him a new body. Altogether, Coulson has died six times, or seven, if you include the time he faked his death. There was also the time Fury killed a Skrull impersonating Coulson in Captain Marvel, but that doesn't really count.