The NPR asserts that production of low-yield nukes would enhance the credibility of the American nuclear arsenal.
A critical element of US nuclear deterrence, it is reaching the end of it's useful life after 33 years in service.
The spokesman added that his country also wants the USA to take a fair view of China's national defense and military development.
Chinese defense ministry spokesperson Ren Guoqiang criticized the US Nuclear Posture Review in a statement released on Sunday.
China's Defence Ministry spokesman Ren Guoqiang said that the U.S. document presumptuously speculated about the intentions behind China's development and played up the threat of China's nuclear strength, reports PTI.
The new policy - the first update of the Nuclear Posture Review since 2010 - pushes modernization of US nuclear weapons, infrastructure and delivery systems.
Earlier in a tweet, Iranian Foreign Minister Mohammad Javad Zarif warned that the USA policy document pose the risk of bringing humankind closer to annihilation.
The US nuclear doctrine, published on Friday, said that Russian Federation and China have added new types of nuclear capabilities to their arsenals, engaging in "increasingly aggressive behavior, including in outer space and cyberspace".More news: Ideal 2018 release to create massive sales boost
The policy also recommends: Land-based ballistic missiles, submarine-launched missiles, and air-delivered weapons-to be extensively modernized, as begun under ex-President Obama.
The government of President Donald Trump announced that it will give continuity to a large part of the nuclear weapons policy of former President Barack Obama, but will adopt a more energetic stance with Russian Federation.
Proposed modification of some submarine-launched nuclear warheads to give a lower-yield or less powerful detonation.
China "has always kept its own nuclear forces at the minimum level required by national security", Mr Ren said.
China urged the United States to drop its "Cold War mentality" and not misread its military build-up and warned against running on anti-peace pathway, after Washington published a document on Friday outlining plans to expand its nuclear capabilities to deter others. Previous year it said that Washington's defense strategy tied to "outdated notions".
In the NPR document, the U.S. accused China of "expanding its already considerable nuclear forces" but China defended its policy on Sunday saying it would "resolutely stick to peaceful development and pursue a national defence policy that is defensive in nature".