The figures come after the two sides exchanged tit for tat tariffs on billions of dollars worth of goods and Donald Trump threatened to up the ante with measures on a colossal $200 billion of Chinese imports.
Beijing said China's surplus with the US hit an all-time high $28.97 billion last month, while exports to the country hit a record $42.62 billion.
Over the first six months of the year the surplus climbed to $133.8 billion as total two-way trade continued to expand despite the face-off.
The imbalance is at the heart of Trump's anger at what he describes as Beijing's unfair trade practices that are hurting American companies and destroying jobs.
But in a statement from its commerce ministry Thursday, China blamed those problems on the US, saying the imbalance was "overestimated" and caused by America's own "domestic structural problems".