The goal of achieving carbon peak no later than 2030 and carbon neutrality no later than 2060 in China needs joint efforts of society. Besides industrial restructuring，energy structure adjustment，energy saving and reducing emissions，participating flexible voluntary emission reduction mechanisms is an important supplement for achieving carbon neutrality. Participate in voluntary carbon trading in China and abroad to promote implementation of carbon emission reduction projects，so that the goal of carbon neutrality could be promoted. As difficulties exist in China and abroad，participation of emission reducing companies in emission trading is hindered. Public participation could promote emission trading，which is affected as lack of public participation platform and variety of carbon trading products. Based on the analysis of difficulties in achieving carbon neutrality and current situation of voluntary carbon trading，the “forest carbon sink equivalent” is put forward in the text to make connection of voluntary carbon trading platforms globally and different carbon emission reduction credits，so that various carbon credit products could be traded in form of forest carbon sink equivalent in one platform，which could promote public participation in carbon trading and achievement of carbon neutrality.