Frisby CofE Primary School beat Harby CofE Primary School in the final to land the title in front of a large crowd at the home of Guinness Premiership champions Tigers.
The tournament also featured Old Dalby Cof E and Somerby primary schools and was held before Tigers took on Northampton Saints in the Guinness Premiership on Saturday.
Scott Clarke, Tigers community manager, said: "The standard of tag rugby was very high and there were some close games. Everyone played with a smile on their face and really enjoyed the occasion."
Frisby joined Harby, Somerby and Old Dalby in the finals after taking part in Tigers’ Santander Alliance & Leicester Tag programme.
Tigers coaches spent three weeks in schools in the Melton area earlier this season, introducing children to tag rugby which culminated in a festival at Melton RFC from which the four schools qualified to play at Welford Road.
Frisby beat Somerby 6-4 to set up a final with Harby, who qualified by virtue of scoring the first try against Old Dalby after their game ended in a thrilling 7-7 draw.
Frisby celebrated victory by beating Harby 7-4 in the final while Somerby beat Old Dalby 5-4 to win their second game.
Clarke said: "Everyone who took part, from the children to the staff to their parents, should take a lot of credit for an excellent day."
Tigers coaches are currently working with schools in Rutland and will move on to Leicester city later in the year.
Tigers will hold festivals at the end of each course from which schools will qualify to play in their area finals before a first-team game at Welford Road.
The winners will then join Frisby for a play-off to decide the 2010 Santander Alliance & Leicester Tag champions.
More information is available by clicking here or by calling the Tigers community team on 0116 2171 221.