Paris Hilton Intruder Pleads Not Guilty to Stalking

The man who snuck onto Paris Hilton's Hollywood property last year ... then tried to propose to her in February ... then attacked her ex-BF in April ... just pled "not guilty" to two felony stalking charges.

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36-year-old James Rainford -- who was most recently arrested last week after allegedly spying on Paris' Malibu Beach home -- also pled not guilty to three misdemeanor counts of disobeying a court order to stay 200 yards away from Hilton.

Rainford is still in custody on $150,000 bail. He's due back in court on July 26th.