Pressing technology of winding core into shell, as a key process of motor assembly, is analyzed. In order to achieve intelligent manufacturing, the process of pressing the stator into the shell is improved, and the digitalized horizontal automatic pressing equipment for stator casing and the matching tooling, which are controlled and coordinated by PLC system, are designed. This pressing equipment can realize the functions of automatic positioning, horizontal clamping and pressing, collecting/feedback/monitoring of pressing parameters, interaction with the digital workshop operation management system, etc. Practical application results show that the pressing efficiency is increased by 40%, the product defective rate is decreased by 85.7%, and the manpower is reduced by 30%.