The three-time winner powered his way past Djokovic, who went down 6-4 6-2 7-6 (7-3) in the Roland Garos clash.
Nadal has now set himself up for a shot at Bjorn Bjorg's run of four consecutive French Open titles which he completed in 1981.
The winner of the other semi-final between Roger Federer and Gael Monfils will be Nadal's opponent in the Roland Garos showpiece.
Federer said of the tie "It's always a great pleasure being in the last four. It’s really where it gets most interesting.
"This is usually where I hope to play my best, and especially here at the French, which one is supposed to maybe be the toughest one for me."
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