Maryse -- a WWE diva who's been romantically linked with former WWE champion The Miz -- filed a request for a permanent restraining order against 61-year-old Lee Silber ... claiming he has sent "numerous terrifying letters to my home and left more than 50 voicemails on my personal cell phone all of which are extremely disturbing and delusional."
In one of the letters Maryse claims she received from Silber, he promises to "not only give you a check for $100,000, but give you a 100 carat diamond ring worth $20,000,000 to prove I am your friend."
Maryse says Silber's letters have gotten scarier over the last few weeks ... with Silber promising that he will be "coming to LA for me" ... and will "take me to heaven with him."
In the docs, filed in L.A. County Superior Court, Maryse states, "I fear for my life."
Maryse tells TMZ she's beefed up security at her home recently ... calling Silber a "crazy stalker ... who needs to either be in a psychiatric hospital or jail!"
Maryse is due back in court August 3rd.
TMZ placed several calls to Silber for comment -- so far, no response.