Printer cartridge

The invention discloses a printer cartridge. The printer cartridge comprises a cartridge shell, an ink inlet mechanism, a floating block and an exhaust channel; the cartridge shell is partitioned intoa first ink storage space and a second ink storage space through a baffle; the ink inlet mechanism comprises a cylinder of which the two ends are open, a first sponge, a first filter screen, a secondsponge and a second filter screen which are arranged under the first filter screen, a third sponge and a third filter screen which are arranged under the second filter screen and a fourth sponge arranged under the third filter screen, the upper portion of the fourth sponge is connected with the third filter screen in an abutting mode, and the lower portion of the fourth sponge is adhered to the bottom of the cartridge shell; and one end of the exhaust channel communicates with an inner cavity of the second ink storage space, and the other end of the exhaust channel communicates with an external environment and is prov