"There must be no one in the military who harbours disloyalty to the (ruling Communist) Party," Xi said in remarks published by the official Xinhua News Agency on Saturday.
Xi was speaking at a plenary meeting of the delegation of China's People's Liberation Army and People's Armed Police Force as China holds its annual "two sessions" meetings of its top legislature and its top political advisory body.
An anti-corruption campaign launched by Xi shows no sign of letting up after more than a decade. The military has been targeted in recent years, including the removal of its top general last month, as Xi seeks to reform and modernise the armed forces.
Analysts say the campaign is also a way for Xi, who is in his 14th year in power, to remove potential rivals and ensure absolute loyalty among his subordinates.
The National People's Congress last week dismissed nine military officers, including two under the Central Military Commission, the military's highest body, as well as others from the army, the navy, the air force and the rocket force. Three generals were this week removed from China's top political advisory body.
"There must be no hiding place for corrupt individuals," Xi was cited by Xinhua as saying .
"The fight against corruption must be resolutely pushed forward."
Chinese leaders this week also pledged a seven per cent defence budget growth for this year to about 1.9 trillion yuan ($A384 billion), slightly lower than the about 7.2 per cent annual increase over the past three years.
