The Himalayan nation has faced problems bringing in supplies of food and fuel as routes from India have been blocked by protesters opposing Nepal's new constitution.
The Nepali government had asked China to hasten the reopening of two border crossings. They have been closed since two earthquakes killed more than 9,000 people in Nepal in April.
"The China-Nepal Jilong border crossing that was damaged during the Nepal earthquake at present has reopened," Chinese Foreign Ministry spokeswoman Hua Chunying told a daily news briefing.
"As far as I know, today the Chinese side through this border has already transferred a supply of aid goods and materials," she said, adding that China would continue to send aid based on Nepal's needs.
Nepal is sandwiched between India and China, which themselves have a festering border dispute.
The two Asian giants have used aid and investment to court Kathmandu for years. China is also a close ally of Pakistan, India's neighbour and arch-rival.
