Reusable ink box of printer

The invention discloses a reusable ink box of a printer. The reusable ink box of the printer comprises an ink box shell, an ink feeding mechanism, an exhaust channel and a seal piece. The ink box shell is divided by a first baffle into a first ink storage space and a second ink storage space. The ink feeding mechanism comprises a cylinder with the two ends being open, a first sponge, a first filter net, a second sponge, a second filter net, a third sponge, a third filtering net and a fourth sponge arranged on the lower side the third filtering net, wherein the second sponge and the second filtering net are arranged on the lower side of the first filtering net, the third sponge and the third filtering net are arranged on the lower side of the second filtering net, and the upper portion of the fourth sponge abuts against and is connected with the third filtering net, and the lower portion of the fourth sponge adheres to the bottom of the ink box shell. The exhaust channel comprises an inclined exhaust channel b