The invention discloses a co-pyrolysis method for alkaline residues and a discarded printed wiring board. The method includes the steps that the discarded printed wiring board is subjected to heat treatment, soldering tin is removed and electronic components are dismantled; the discarded printed wiring board subjected to heat treatment and the alkaline residues are mixed and then are put into an atmosphere pyrolyzing furnace for oxygen-deficient non-sufficient combustion; after a pyrolysis volatile component is washed and purified, pyrolysis oil and pyrolysis gas are recovered, the pyrolysis gas serves as fuel gas to return to the atmosphere pyrolyzing furnace, a pyrolysis residue phase component is screened and separated, an oversize component is crushed and winnowed, and a metallic material and an inorganic nonmetallic material are recovered; and a screen underflow component returns to the atmosphere pyrolyzing furnace to be recycled. By adoption of the method, the alkaline residuesand the discarded printed wiring board are cooperatively treated, and various sorts of metal, nonmetal and organic matter in the discarded printed wiring board are fully recycled; and moreover, the alkaline residues can be fully utilized, the characteristics of being environmentally friendly and low in energy consumption are achieved, and full-resourcing clean recycling of the alkaline residues and the discarded printed wiring board is truly realized.