Front-in and front-out ink-jet printing device

The utility model discloses a front-in and front-out ink-jet printing device, comprising a frame, an ink jet unit with printing heads, a sheet passage, and a paper advance mechanism. The ink jet unit comprises an ink box containing quick drying ink. The sheet passage is a horizontal passage which makes print media horizontally move. A paper feed port and a paper exit of the sheet passage are a same opening on a front side of the sheet passage. The ink-jet printing device uses a 1-shaped sheet passage, the print media enters from a front side and goes out from the front side, and operation is humanized, so requirements on softness of print media is recued. The quick drying ink is used to print, so the quick drying ink jetted from the printing heads and attached on the print media is already solidified and dried before reaching friction wheels of the paper advance mechanism, thereby solving problems that the friction wheels scratches ink marks that are not dried and then images are distorted. Device structure i