The British no. 1 secured a comfortable 7-6 (7-1) 6-1 over Agut.
The Brit will play Bautista Agut in the final in Shanghai, after he beat the world number one.
Djokovic faces Agut in the semi-final of the Shanghai Masters. Find out where to watch live.
Elsewhere, world number one Novak Djokovic came back from a set down to defeat qualifier Mischa Zverev.
Rafael Nadal's season has been hampered by injuries and loss of form.
Djokovic faces Zverev in the quarter-final of the Shanghai Masters. Find out where to watch live.
Novak Djokovic faces Fabio Fognini in the Shanghai Masters. Find out where to watch live.
British number one claims fifth title of 2016 with 6-4 7-6 victory in Beijing.
The Serb has struggled for form in recent times, suffering early exits in both 2016 Wimbledon and Olympics.
Andy Murray is the top seed at the ongoing 2016 China Open.
Nadal is a 14-time Grand Slam winner.
Djokovic has won 12 Grand Slam titles in his career.
Djokovic withdraws from China Open and could allow British number one an opportunity.
Novak Djokovic will next play the China Open, which starts on 3 October.
Kyrgios is currently representing Australia in the 2016 Davis Cup.
Novak Djokovic suffered a shock loss to Stan Wawrinka in the final of the 2016 US Open.
The 31-year-old clinches his third career Grand Slam after win at Flushing Meadows.
Novak Djokovic aims to win his third US Open title against Stan Wawrinka on Sunday.
Djokovic and Wawrinka defeated Monfils and Nishikori respectively in the semi-final.
Novak Djokovic faces Gael Monfils in the semi-final. Find out where to watch live.
The Serb won after a knee injury forced Jo-Wilfried Tsonga to quit.
Novak Djokovic faces Jo-Wilfried Tsonga in the quarter-final. Find out where to watch live.