The work aims to combine the traditional express delivery, mobile internet and mechanical innovation design, and then propose a design scheme for carrier application in the last part of express delivery. The design mainly included the carrier delivery mechanism, automatic control system and an express information management APP. Firstly, the courier used a mobile phone APP to scan the express QR code, and recorded the specific location for the storage of the delivery mechanism; secondly, the customer received the message for pickup, and then the express could be easily located; finally, the stepper motor of control system drove the delivery device to move, and the express pallet was transmitted to the exit position automatically. The conclusion is that the new mechanical device in conjunction with the smart phone not only arranges the delivery in a neat and orderly way, but also reduces the labor intensity of courier to find the express quickly and accurately. It also improves the efficiency of delivery and has certain value of application. The application of this device can promote the development of intelligent logistics.