Abstract: As one of the brilliant leaders of CCP and Chinese government, Wan Li has attached much importance and made great contributions to environmental protection and afforestation. In his key instructions, speeches, talks and writings, Wan Li has put forward important environmental protection thinking which insists that environmental protection should serve the people, economic development should coordinate with environmental protection, industrial pollution should be prevented by reasonabledesign and planning, environmental protection should have faith in and rely on the masses of people, city planning and management should be stressed and well dealt with, and the efforts to do well in afforestation is beneficial to future generations. These ideas are of great guiding significance for the advancement of China's environmental protection and socialist ecological civilization construction.