"In this complex environment, BRICS member states need to… strengthen their development and ability to stand up to external challenges," he said at a BRICS summit on the margins of the G20 Summit in Japan.
Xi said Brazil, Russia, India, China and South Africa needed to work closer together and build relationships that were of mutual benefit and based on mutual respect and fairness.
"We need to make BRICS more competitive, take on a more active role in the global cooperation on innovations and… create an open, fair and nondiscriminatory climate," he added.
The Chinese president said he supported Brazil’s proposal to focus on stimulating "innovative cooperation" between the five member states this year in order to re-energise "high-quality development."
The G20 is a forum for international cooperation that hosts 20 countries representing more than 80% of the global GDP. The summit in Osaka will host the heads of state of 19 countries and the European Union, while related ministerial events will be held in eight cities this year.