The demise of the nine-ton space station had been the subject of scientific speculation for months amid fears large chunks of it could come down near population centers.
Experts had been unable to predict where the installation, which is roughly the size of a school bus, would come down but in the end it re-entered the earth's atmosphere over the South Pacific.
The craft re-entered the atmosphere around 8.15am Beijing time (0015GMT) and the 'vast majority' of it had burnt up upon re-entry, the China Manned Space Engineering Office said.
Just minutes before, their best estimate predicted that it was expected to re-enter off the Brazilian coast in the South Atlantic near the cities of Sao Paulo and Rio de Janeiro.
China's space authority said on Sunday that the station would hit speeds of nearly 17,000mph before disintegrating. They previously said its fiery disintegration would offer a 'splendid' show akin to a meteor shower but the remote location likely deprived stargazers of a spectacle of fireballs falling from the sky.
Scientists monitoring the craft's disintegrating orbit had forecast the craft would mostly burn up and would pose only the slightest of risks to people. Analysis from the Beijing Aerospace Control Center showed it had mostly burned up.
The Aerospace Corporation had earlier predicted Tiangong 1's re-entry would take place within two hours either side of 1.30am BST on Monday (8.30pm on Sunday in New York and 10.30am on Monday in Sydney).
Based on the space station's orbit, it could have come back to Earth somewhere 43 degrees north and 43 degrees south, a range covering most of the United States, China, Africa, southern Europe, Australia and South America.
The United States Air Force 18th Space Control Squadron, which tracks and detects all artificial objects in earth's orbit, said they had also tracked the Tiangong-1 as it re-entered the atmosphere over the South Pacific.
It said in a statement they had confirmed re-entry in coordination with counterparts in Australia, Canada, France, Germany, Italy, Japan, South Korea and Britain.
Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics, said the module zoomed over Pyongyang and the Japanese city of Kyoto during daylight hours, reducing the odds of seeing it before it hit the Pacific.
'It would have been fun for people to see it, but there will be other reentries,' McDowell told AFP. 'The good thing is that it doesn't cause any damage when it comes down and that's what we like.'
Authorities had warned that the chances of any one person being hit by debris was considered less than one in a trillion by the Aerospace Corporation.
Meterologist Bryan Bennett said: 'When it reaches 65 miles above the Earth it will no longer be able to orbit and will begin its rapid re-entry. Atmospheric breakup will begin when it reaches 50 miles above the Earth and undergo a fiery reentry until about 30 miles.'
Only about 10 per cent of the bus-sized, 8.5-ton spacecraft will likely survive being burned up on re-entry, mainly its heavier components such as its engines.
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