Environment protection printer ink cartridge

The utility model relates to an environmental protection printer ink box comprising ink box housing and face covering. At least one chamber for ink storage is provided inside the Housing. An ink-supply outlet connected with the printer is arranged in the bottom of the housing. The ink stored in the chamber enters into ink-supply outlet through ink-supply sink. A venthole an ink supplement orifice are arranged on the top of Ink box housing. The Ink supplement orifice is communicated with the chamber for Ink Storage. The venthole is communicated with the air drain arranged in the housing. The air drain communicates with the bottom air inlet of chamber for ink storage. The utility model can maintain constant ink pressure in ink outlet with the fluid pressure principle, thereby the printing quality is guaranteed.