Romeo -- BLASTS Mom ... Get Your Life Together If You Want Millions from Master P

Romeo has some divorce advice for his mom -- if you want $67 million ... you need to earn it, and it starts with being a good mother.

Romeo opened up last night about his mom and dad ... Sonya Miller and Master P's split -- and her legal demand for a chunk of his empire ... telling us, "Honestly, I love my mom to death, but I mean -- we gotta just work out some things. She gotta be a better parent, y'know."

It sounds like he's referring to Master P's allegations that Sonya is smoking marijuana around their children ... which she's denied.