Digital printing device having suction conveying means (1). The suction transport means (1) comprises a transport belt (11) used to transport the sheet material. The space defined by the transport belt (11) is provided with at least one first suction box (14), the at least one first suction box (14) being capable of generating negative pressure during transport. It is used to suction the sheet material on the transport belt (11). A plurality of first suction holes are provided on the transport belt (11) in communication with the first suction box (14). At least one side of the first suction box (14) is provided with a movable door (15), which moves in a direction perpendicular to the transport direction, the first suction box (14) Fit the sheet material and maintain a negative pressure condition. By transporting the sheet material using the transport belt (11) during printing, the digital printing apparatus avoids the problem of poor registration accuracy and improves the printing effect. Furthermore, by providing the moveable door (15) on the first suction box (14), the present invention precisely matches the width of the first suction box (14) to the width of the sheet material, thus Sheet materials of different specifications can be conveyed in corresponding negative pressure suction areas, thereby avoiding air leaks and providing a good negative pressure suction effect. [Selected figure] Figure 1
展开▼
