Senegal international Papiss Cisse was often utilised as a lone striker last season after Demba Ba departed St James' Park for eventual Europa League winners Chelsea in January.
Yoan Gouffran, Shola Ameobi and youngster Adam Campbell all provide competition in Newcastle's forward line, but Pardew is keen to bolster his options with Aston Villa's Darren Bent and Loic Remy of QPR mooted as potential targets.
"I think we might need two strikers," Pardew told the Shields Gazette.
"I personally think, my competition in that area - Cisse, Shola, Gouff [Gouffran] and Adam Campbell - last season wasn't strong enough.
"In the Premier League, that's not enough. I need more than that."
Elsewhere, midfielder Cheikh Tiote said he will evaluate why he failed to hit top form during the last campaign.
The 27-year-old attracted several suitors as Newcastle achieved a fifth-place finish in 2011-12, but a series of niggling injuries saw his performances stutter as the club narrowly avoided relegation 12 months later.
"It wasn't a top, top season for me, but that's football," he commented. I think it's important to think about yourself when you finish the season.
"You have to think why it didn't go so well. That's normal."