China's approval to the agreement came a day ahead of the G20 summit in Hangzhou, where the leader of the world's two biggest polluters - US and China - will meet.
China and the US together are responsible for around 40 per cent of the world's emissions so their ratification of the international legal document is viewed crucial.
The Paris Agreement is the third attempt to address the issue of climate change, after the 1992 UN Framework Convention on Climate Change and the 1997 Kyoto Protocol.
Lawmakers of the Standing Committee of China's National People's Congress voted to adopt "the proposal to review and ratify the Paris Agreement," state-run Xinhua news agency reported.
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"Ratifying the agreement accords with China's policy of actively dealing with climate change," according to the proposal, which added that addressing climate change would help the country realise sustainable development.
The proposal said that ratifying the agreement was conducive to China's development interests, and it will also help the country play a bigger role in global climate governance.
The Paris accord (COP21) aims to reverse temperature increase, mainly caused by carbon emissions. It sets a target to hold the global average rise in temperature below 2 degrees Celsius above pre-industrial levels, and preferably below 1.5 degrees.
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To fulfill its commitment to Paris climate pact, China will have to cut its carbon emissions per unit of GDP by 60-65 per cent by 2030 from 2005 levels, increase non-fossil fuel sources in primary energy consumption to about 20 per cent, and peak its carbon emissions by 2030.
Before the Paris agreement US and China reached a bilateral agreement in 2014 setting new targets for carbon emissions reductions by the US and a first-ever commitment by China to stop its emissions from growing by 2030.
The NPC ratified the climate agreement ahead of the G20 summit starting here tomorrow.
The G20 summit will also discuss the commitment of the developed countries to set up USD 100 billion fund for the developing countries to cope up with the costs of the effects of climate change.
Countries have one year to ink the agreement as it is open for signatures until April 21, 2017.
So far only 24 of the 180 signatories have ratified it, including France and many island states threatened by rising sea levels.
Only developed countries are expected to slash their emissions in absolute terms.