The utility model belongs to the technical field of elevating gear, especially a special elevating gear of ink-jet printer, aim at directly placing the ink-jet printer on the placing plate, lack the fixing mechanism to the ink-jet printer, the ink-jet printer is easy to displace or fall, present the following scheme, it includes: base, elevating gear is located on the base, and the elevating mechanism is connected with the placing plate on the elevating mechanism, fixing mechanism, be located on the placing plate, be used for fixing the ink-jet printer host computer, anti-touch mechanism, be located on the placing plate, print head mounting mechanism, be located on the placing plate, be used for with the print head of ink-jet printer connection. The utility model is convenient to the host computer of ink-jet printer and fixes, improves its stability of use, through the rotary block cover, avoids the rotary block to be mistaken and leads to the loose clamp plate.