The invention discloses a motor support assembling production line comprising a support feeding unit. A tapping unit, a bearing assembling unit, a pressing sheet assembling unit, a bearing and pressing sheet detecting unit, a riveting unit, carbon sleeve assembling units and rivet assembling units are arranged on the two sides of the support feeding unit. A first feeding conveyer belt, a tapping unit section conveyer belt, a dividing plate conveyer belt, a second feeding conveyer belt, a third feeding conveyer belt, a carbon sleeve and rivet assembling unit section conveyer belt and a support discharging conveyer belt constitute the support feeding unit and are sequentially connected and installed. The motor support assembling production line solves the problems that because assembling of parts of a motor support are always completed by multiple people on multiple stations and the production process is long, semi-finished products are overstocked, and the quality cannot be controlled in time.