Wet recovery method of poor positive electrode material, positive electrode material and lithium iron phosphate battery

The invention relates to a wet recovery method of a poor positive electrode material, the positive electrode material and a lithium iron phosphate battery. The poor material is wholly soaked by adopting a solvent; removing part of the solvent to a preset content by adopting a roller; carrying out wet crushing to a preset size; drying the materials subjected to wet crushing; carrying out pin-rod type scattering treatment on the dried material; carrying out separation treatment on the scattered material; carrying out crushing treatment on the pole powder subjected to the separation treatment; and carrying out screening and demagnetizing treatment on the crushed pole powder. Defective products of the positive electrode material of the lithium iron phosphate battery can be fully utilized, and resource waste is avoided; a lithium iron phosphate positive electrode material in a defective product is recycled by adopting a wet method, an active substance and an aluminum foil are separated by adopting a wet method, an