Nadal, the world No. 1, posted a 7-5, 6-3 decision over Roger Federer in the day's first semifinal, improving to 4-0 in the tournament as he seeks his 11th title of 2013 and first since claiming the U.S. Open crown over Djokovic in September.
He improved to 22-10 lifetime against Federer, including 4-0 this year.
The Swiss star, meanwhile, ended a disappointing 2013 season with just one title -- his fewest since 2001.
Djokovic also improved to 4-0 on the week with a 6-3, 6-3 triumph over Switzerland's Stanislas Wawrinka in the second semifinal.
The Serb advanced with his 21st straight match victory since his U.S. Open loss. Since then, he has bested Nadal at the Beijing final.