Ryan Fraughan opened the scoring after ten minutes. The former Tranmere Rovers winger cut in from the right, before smashing the ball low and hard into the bottom corner.
Moments later Louie Mackin denied Matty Williams and then Greg Draper with two wonderful blocks.
On the 16th minute, Steve Evans powered in an unstoppable header to double the lead.
Josh Dures pulled one back for the visitors after finding himself unmarked at the back post and tapping in from close range.
Draper then capitalised on a defensive mistake before coolly converting and ensured that The Saints went into the break leading 3-1.
Shortly into the second half, the New Zealand international completed his brace with a wonderful finish after some good work in the box.
After 70 minutes Craig Harrison made a number of changes and the team that ended the game was Paul Harrison, Simon Spender, Phil Baker, Kai Edwards, Luke Douglas, Aeron Edwards, Chris Seargeant, Alex Darlington, Scott Quigley, Ryan Jones and Greg Draper.
Phil Baker made it five with a brilliant header after meeting a fantastic cross from Luke Douglas. The youngster was quick to react to a short corner and whipped in an incredible ball which Baker steered in.
Substitute Scott Quigley tested the visiting goalkeeper late on but the friendly finished TNS 5 1 Conwy Borough.
The New Saints starting line up against Conwy Borough was Paul Harrison, Aaron Simms, Chris Marriott, Connell Rawlinson, Steve Evans, Sam Finley, Scott Ruscoe, Matty Williams, Ryam Fraughan, Jamie Mullan and Greg Draper.