A height-adjustable air dryer bushing press-fitting device comprises a bottom plate base, a height support, a guide connecting plate, a supporting support, a turnover pressing plate, a press-down connecting rod, a movable pressing rod and a handle, wherein one end of the guide connecting plate is perpendicularly connected with the middle of the height support, the other end of the guide connectingplate is in sliding fit with the movable pressing rod, the supporting support is arranged at the top of the guide connecting plate, the turnover pressing plate is arranged at one side of the supporting support, one end of the turnover pressing plate is in rotating fit with the top of the supporting support, the other end of the turnover pressing plate is in rotating fit with the top of the press-down connecting rod, the bottom of the press-down connecting rod is in rotating fit with the top of the movable pressing rod, a limiting bolt in limiting fit with the turnover pressing plate is arranged on the supporting base, and the handle is further fixed to the turnover pressing plate. According to the design, the device is simple in structure and convenient to operate, the press-fitting depthcan be adjusted through the limiting bolt, and the consistency of press-fitting products can be guaranteed.