The invention discloses an anti-friction and anti-attrition chemical additive for a biomass engine oil purification filter element. The chemical additive is prepared from the following substances in parts by weight: 1-2 parts of LZ6499 overbased sulfurized calcium alkyl phenolate, 2-4 parts of Infineum C9394 overbased sulfurized calcium alkyl phenolate, 0.5-1.5 parts of Vanlube8610 antimony dialkyl dithiocarbamate, 0.001-0.003 part of rongalite sodium formaldehyde sulfoxylate, 1-3 parts of Vanlube DND nonyl diphenylamine, 0.5-1.5 parts of T353 dibutyl dithiocarbamate lead, 2-4 parts of a YP-1202 energy-saving agent, 0.4-0.6 part of an LZ6662 nitrogen-containing compound, 9-10 parts of a JINEX 9900 viscosity index improver and 13-15 parts of PAO-10 base oil. According to the chemical additive for the volumetric filtration biomass engine oil purification filter element, an anti-friction additive and an antifriction agent are continuously input into engine oil and act in an engine cylinder as a carrier through a slow release function of the volumetric biomass engine oil purification filter element, so that the friction force between metal contact surfaces is reduced, the 'work strength' of the engine oil is reduced to achieve online overlong use of the engine oil, and ageing and deterioration are avoided.