In a speech on Monday, Xu Xiaohong head of the National Committee of the Three-Self Patriotic Movement of the Protestant Churches in China, said there were many problems with Christianity in the country, including "infiltration" from abroad and "private meeting places".
"It must be recognised that our movement's surname is 'China' and not 'Western'," Xu said, according to remarks reported on Tuesday by the United Front Work Department, which is in charge of co-opting non-communists, ethnic minorities and religious groups.
"Anti-China forces in the West are trying to continue to influence China's social stability and even subvert our country's political power through Christianity, and it is doomed to fail," he said, speaking to parliament's largely ceremonial advisory body.
"For individual black sheep who, under the banner of Christianity, participate in subverting national security, we firmly support the country to bring them to justice."
Only by eliminating the "stigma of foreign religion" in China's Christianity can its believers benefit society, he added.
"Only by continually drawing on the fine traditions of Chinese culture, can China's Christianity be rooted in the fertile soil of Chinese culture and become a religion recognised by the Chinese themselves," Xu added.
"Only by continuously carrying forward and practising the core values of socialism can our Christianity truly be suited to socialist society."
China has been following a policy it calls the "Sinicisation" of religion, trying to root out foreign influences and enforce obedience to the Communist Party.