Organic waste is an important biomass resource. In this study the definition of coefficients for the calculation of all the secondary 10 forestry residue categories was improved and established according to literature reviewing of previous reports between 1982 and 2017. The rationality of value-taking for each coefficient in previous literature was examined by tracing to its citation sources. The irrational, or unstudied coefficients were assessed using the data in previous reports or questionnaire surveys. Lastly, values of the coefficient for the calculation of woody nursery residue, forest woody pruning residue, wood logging residue, firewood, wood bucking residue, wood handling residue, waste wood, banana and pineapple plant residue, bamboo processing residue and waste bamboo were reasonably assessed in this study.