The invention discloses a shaft type automatic assembling device for expansion bolts. The shaft type automatic assembling device is composed of a rack, a shaft type assembling device body, a centre pushing device, a swing arm pressing device and a feed conveying device. The shaft type assembling device body and the swing arm pressing device are installed on the rack, and the centre pushing device is installed on a work tabletop. All standard parts are stably conveyed to the shaft type assembling device body through the feed conveying device. The shaft type assembling device body conducts assembling work continuously. A plate of the shaft type assembling device can be replaced, and the shaft type automatic assembling device can be applied to assembling of expansion bolts with multiple specifications after replacement. The shaft type automatic assembling device for the expansion bolts is simple in structure, low in cost, reliable in work and capable of effectively improving the assembling efficiency of the expansion bolts and the assembling yield.