The commitment was made Chinese President Xi Jinping during a meeting with President Ashraf Ghani Ahmadzai on Tuesday.
Mr. Jinping said he will also call on Shanghai Cooperation Organization (SCO) members to focus on cooperation with the Afghan government.
He said China is expecting to witness peace, stability and unity in Afghanistan.
President Ghani is a on a 4-day state visit to China to meet with the Chinese officials and attend an international conference on Afghanistan hosted by China.
Having influential roles in the region, China is quietly preparing to play a key strategic role in the future of Afghanistan.
China has so far committed around $250 million to the reconstruction of Afghanistan following the fall of the Taliban regime in 2001, but had limited security support to Afghanistan which was only focused on counter-narcotics training.
China has a $700 million agreement to drill for oil in the Amu Darya Basin and a $3 billion deal to develop the Aynak copper mining project.