The 37-year-old scored his first goal for the Saudi Pro League side last week but followed that up with a clinical display at the King Abdul Aziz Stadium on Thursday evening.
Ronaldo reached his latest milestone by opening the scoring for Al-Nassr in the 21st minute with a neat low finish.
The former Manchester United forward then doubled Al-Nassr’s lead with another firm strike five minutes before half time.
Ronaldo completed the 61st hat-trick of his career from the penalty spot to put Al-Nassr even further in front in the 53rd minute.
The Portugal international then capped an excellent display as he raced onto a through ball and scored the rebound after his first effort was saved.
The 4-0 win puts Al-Nassr top of the Saudi Pro League on goal difference, although they also have a game in hand over second-placed Al-Shabab.
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