Everton boss Martinez believes the FA's plans will have maximum benefit for English players.
FA chairman Greg Dyke yesterday unveiled a radical four-point plan that included restrictions on non-European Union players outside of the Premier League and limiting the number of non-homegrown players within top flight squads in a bid to improve the current lack of emerging talent.
But the proposal to introduce a League Three consisting of Premier League 'B' sides and Conference outfits in time for the 2016-17 campaign has generated controversy, particularly as second string sides could be promoted as high as League One under the planned legislation.
Football League advocates claiming that the plans will devalue both the structure and standard throughout the footballing pyramid, but Everton manager Martinez feels that the idea of 'B' teams, long established in his native Spain, can only benefit English football as a whole.
"I know there is going to be a lot of debate and it's going to be a lot of talking about it but I think it's very, very positive," he told his pre-match press conference.
"I think, first and foremost, we need to be aware that there is a big problem in the development of our youngsters, that age group from 18 to 22-23. We haven't got enough competitive football and that's a reality. I think the Premier League have been working really hard at it to find a solution.
"Now the FA have come up with something I think is very exciting. I know that 'B' sides is something that works if you work at it properly. I know there are other proposals, not just the 'B' teams, but I would be in favour of having 'B' teams and we would all get the benefits.
"I think the young English players would get the benefits - not straight away because you have to allow relegation and promotion to take effect and after a few years you would see that's a real benefit.
"But that's just a starting point and I'm sure there's going to be a lot of aspects that they need to be tweaked and in my eyes the possibility of playing Championship football should be contemplated and even increasing the age group.
"I don't think it should [just] be the age of 21. Sometimes you get late developers and players that get injuries and we should consider that.
"But the top and bottom, it's very positive that the FA and the Premier League have got a lot of work now and that's going to improve our game without a doubt."