The rapid development of electric vehicles has posed higher demands for charging piles. It is important to investigate a class of mobile charging piles for electrical vehicles to better satisfy the charging demands. By analyzing the environmental and technical requirements of mobile charging piles, the hardware and software system for a mobile charging pile are designed. CATIA is used to mimic the model of the mobile charging pile structure, while ANSYS Workbench, which is a finite software, is used to simulate and analyze strength and feasibility. The CANBUS bus is applied to establish the communication between the charging pile control system, vehicle BMS and the charging module. A CAN isolation circuit including ADUM1412 is used to avoid interference. ATK-1218-BD, which is a module of Beidou GPS, is employed to constitute the wireless positioning system, followed by a designed emergency charging stop safety module and a charging gun detection module. Results show that the maximum deformation value of the hardware structure is 3.07 mm, while the maximum stress is 134.41MPa. The vertical line of the charging pile gravity center is within the range of the structure bottom. This meets the requirements of strength and stability. The control system has shown complete functions. Specifically, the safety emergency stop module and charging gun safety detection module ensure safety while using the charging pile, providing a useful guideline for future engineering practice. This work is supported by the National Natural Science Foundation of China (No. 51515072).