The invention discloses a drying auxiliary device of water-based ink. The drying auxiliary device comprises a firstly opened cover, and the middle part of the firstly opened cover is raised and is provided with a first through hole; the first through hole communicates with a hot air pipe outlet; a hinge is arranged on the side edge of the firstly opened cover; the firstly opened cover is connected with an infrared and hot air tank through the hinge; an infrared and air knife edge is arranged in an inner cavity of the infrared and hot air tank; a water-based ink transfer object is clamped between the firstly opened cover and the infrared and hot air tank; and an infrared lamp terminal is arranged in the position, on the lower side of the hinge, on the infrared and hot air tank. According to the drying auxiliary device, an infrared hot air drying device is added in a conventional system, after being transferred, water-based ink passes through an original drying system, transferred water-based ink dried through the device can well and perfectly adhere to a printing product, and quality of the printing product is improved while utilization speed of water-based ink is completely the same as printing speed of original solvent ink.