Plant activated carbon for food additives

The invention discloses plant activated carbon for food additives, which is prepared by the following steps of: material crushing: collecting straws, fully drying the collected straws in the sun for 15-20 days, crushing the straws into particles with the particle size of 40-50 meshes through a straw crusher, adding dried and crushed lignite into the crushed straws, and sieving the mixture of lignite and crushed straws with a 60-mesh sieve to obtain a mixed raw material; material forming: extruding the mixed raw material obtained in the step S1 into a blocky material through a material formingdevice; and material carbonizing: conveying the blocky material of the mixed raw material formed by the crushed straws and the smashed lignite obtained in the step S2 into a carbonization furnace forcarbonizing. Straws are rich in nitrogen, phosphorus, potassium, calcium, magnesium, organic matters and the like, resources are reutilized, mineral salts are enriched in ash after thermochemical conversion, and meanwhile, the