I want to know the correct english ' She is permitted to be leave' is it correct?
I'd like to state it more firmly: It's incorrect with "be."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
It could pehaps be: "She is permitted to be on leave" it would depend on context.
And 'She is permitted to be left' might be used informally to mean 'it is permitted for her to be left. So you can't say 'Is this grammatical?' with no indication of what you are trying to say. There is at least one error - it could be the presence of 'be', it could be the absence of 'on', it could be the substitution of 'leave' for 'left'. It all depends what you're trying to say.