"It is this year or never more," he told BBC sports editor Dan Roan.
"We achieved the Champions League - a great achievement for everyone but now we try to win the title with all our strength, all our heart, our soul, everything.
"We need eight points and we are champions, and we try to do this. I said to my players that now is the right moment to push."
Ranieri also believes the close bond the players share has been key to the club's success so far this season.
"There's no secret," he said. "There are circumstances. This team has had fantastic circumstances throughout all the season. The big teams, no, they had some fantastic matches and then slowed down.
"When I was a player [at Catanzaro] they were a team and it was unique. We were together for 14 years with eight or nine of my team-mates. We were very friendly and Leicester are the same.
"The players are friends, they play for each other and help each other - that is one of our keys." He concluded.