Song has reportedly attracted the interest of the Catalan club thanks to his displays for the Gunners last season, with a rumoured £15million bid potentially in the offing.
While any official interest from Barcelona remains unconfirmed playmaker Iniesta has spoken of his admiration for the 24-year-old, whose talent he admires.
“I know Song from seeing him play, and from playing against him,” said Iniesta.
“Technically he is a very good player and is also very strong physically too.
“If he comes it would be because he has the qualities to play here, there is little doubt about that, and we’d welcome him.”
Iniesta’s Barca team-mate Sergio Busquets recently made similar comments regarding Song, also expressing his admiration for the player.
Song made 46 appearances in all competitions for Arsenal last season, scoring once.