Nepalese police have been arresting dozens of protesters daily
China has urged the Nepalese authorities to take stronger measures to prevent protests against Beijing's policies in Tibet.
The call came in a statement issued by China's embassy in Kathmandu, where the police arrest dozens of Tibetan demonstrators almost every day.
International human rights groups have expressed concern about the number of detentions and the degree of violence.
Kathmandu is home to thousands of Tibetan exiles.
They have been particularly angered by China's suppression of recent protests in their homeland.
The statement, from Ambassador Zheng Xianglin, said that China wants Nepal to "safeguard the dignity of the law, and take severer measures to prevent those political organisations from organising and implementing illegal political activities".
It went on to say that Nepalis were being manipulated by Tibet's exiled spiritual leader, the Dalai Lama.
"What's abominable are the Dalai clique and the organisations for 'Tibet independence' behind them."
Nepal officially recognises the "One China" policy which views Tibet and Taiwan as indivisible parts of China.
Many Tibetans started arriving in Nepal in 1959, after the Dalai Lama went into exile in India following a failed uprising against China's rule of Tibet.
Protests started in Nepal after rallies in the Tibetan capital Lhasa on 10 March, which marked the anniversary of the 1959 uprising.