Foreign Ministry spokesman Hong Lei said the SCO summit in Russian city Ufa last year initiated the procedures of admitting India and Pakistan into SCO.
"China supports India and Pakistan to join the SCO, and China is willing to cooperate and work with SCO members as well as India and Pakistan to do the follow-up work," he said.
It is important for these two countries to join the six-member grouping, Hong said.
SCO members included China, energy-rich Kazakhstan and Russia, Kyrgyzstan, Tajikistan and Uzbekistan.
Afghanistan, India, Iran, Mongolia and Pakistan have been observers, while Belarus, Turkey and Sri Lanka are dialogue partners in the grouping.
The Beijing-backed SCO is widely seen as a platform for Russia and China to project influence in the region.