"It is a pity that some of the committee members responsible for compiling the concluding observations, due to their prejudice towards China... used some fabricated information," foreign ministry spokesman Qin Gang said.
"They included a lot of slander, false information, acted unfairly and unobjectively, and we resolutely oppose this," Qin said in a statement on the ministry's website on Saturday.
The United Nations Committee Against Torture called on China to probe rights abuses and investigate the crushing of the 1989 pro-democracy movement in Tiananmen Square.
"The committee remains deeply concerned about the continued allegations, corroborated by numerous Chinese legal sources, of routine and widespread use of torture and ill treatment of suspects in police custody, especially to extract confessions or information to be used in criminal proceedings," it said in a report released Friday.
Qin said China continued to "make every effort to safeguard human rights" and that it opposes torture.