The Magpies boss saw his star striker depart after a staggering £35million fee was agreed with Liverpool last season and does not want a repeat of that scenario.
Key midfielder Cheick Tiote, in-form striker Demba Ba, centre-back Fabricio Coloccini and goalkeeper Tim Krul have all been the subject of transfer speculation this season.
St James' Park owner Mike Ashley sanctioned Carroll's sale, but has helped Pardew bring in new faces this season with the £10m arrival of Papiss Demba Cisse.
"I'm scarred by it from last year," Pardew told the Sunday Mirror.
"I still have a fear. I'm never going to lose that because I just genuinely didn't believe Andy Carroll was going to go on that last day until I got the phone call in the morning.
"It just goes to show you have got to be ready."
With the Magpies enjoying an impressive season in the Premier League, Pardew knows it is imperative that they retain all of their key men for the second half of the campaign.
He added: "I will still have my phone on during the last day hoping I get the right sort of call rather than the wrong sort of call - that I'm getting a player in rather than losing a player.
"We've got a great opportunity in this second half of the season.
"It would be a real big bonus to get to the end of the window and not lose anyone."
