CHINESE censors are cracking down on pornography and publishers they claim have churned out material that has ''distorted'' the image of top leaders. According to a dispatch by the official New China News Agency, the crackdown is needed because the publications have violated the interests of the Chinese Communist Party (CCP) and the state and ''polluted the minds of young people''. The decision to crack down on publishers was reached at the end of a three-day conference which closed on Saturday in Beijing, and was held jointly by the CCP Propaganda Department and the State Press and Publications Administration, the dispatch said. It blamed publishers for violating rules with their indiscreet disclosures on the private lives of leaders. It claimed that while some of these reports had erred factually, some violated a CCP resolution on the historic role of Mao Zedong and the Cultural Revolution. The resolution, passed by the CCP in 1981, stated that while Mao had erred in the Cultural Revolution, his contribution must not be denied. Although no publishers were named, it was apparent officials were referring to a number of magazines which have printed reports about Mao and his wife, Jiang Qing. In addition, they were worried about the recent increase of ''nude picture albums'' on the market, saying most of these contained ''tasteless pornography''. However, the propagandists did not blame publishers who were more keen to make money than good literature, saying the two targets did not contradict one other. Chinese sources said that despite repeated attempts by the authorities to crack down on unlawful publications and pornography, the Government's control on the publishing industry remained ''lax and irregular''. In fact, the Government has had to postpone the deliberation of a publication law, mainly due to disagreement within the top echelon.