Provided is a solar power supply system with a plurality of battery packs. The solar power supply system with the battery packs comprises main-and-auxiliary double solar cell panels, a plurality of lithium battery pack energy storage elements, a front end DC/DC voltage change circuit, charging and power supply management circuits, a rear end DC/DC voltage change circuit, an electric quantity detection circuit, corresponding battery protection circuits and a central processing unit CPU. The lithium battery packs are adopted and serve as the energy storage elements, the CPU is used for carrying out energy management on each lithium battery pack, and even when one lithium battery is abnormal, normal operation of the solar power supply system cannot be influenced. Meanwhile, due to the fact that the working mode of the main-and-auxiliary double solar cell panels is adopted, when the main-and-auxiliary double solar cell panels are applied on site, the auxiliary solar cell panel is configured as needed, and flexible configuration of model selection of the solar cell panels can be accomplished. When the solar power supply system with battery packs is used for carrying out charging, efficient charging is carried out on the lithium battery packs according to an MPPT control method, according to the result after the solar power supply system with battery packs is tried out, a power system is good in operation, and the strong guarantee is provided for dynamic improvement of the capacity of power transmission lines, and the stability and the reliability of the solar power supply system.