The trend of legislative fragmentation in the climate field cannot meet China's current requirements in response to climate change.In addition,the lower-level law and the Draft Law on Climate Change have laid foundation for the codification of climate law.Thus,those above reflect the necessity and feasibility of the codification of climate law.Meanwhile,at the micro level,the legislation of the climate law should include the total amount control system,quota allocation system,carbon emission trading system,registration for surrendering allowances system,measurement,reporting and verification(MRV)system,climate change risk assessment and precautionary system and judicial guarantee in the field.On the technical points of legislation,law on climate change should be based on codification as far as possible and adhere to both moderate systematization of regulations and moderate development of codes.Moreover,the layout of chapters should be in accordance with two mainline ideas of mitigation and adaptation.Meanwhile,related authorities should strengthen international cooperation and accelerate the integration with international systems and standards.