The invention discloses a quick balance charging device of a serial battery pack. The quick balance charging device comprises a power input module, a charging control and detection protecting module, a balance charging detection control module and a CPU module, wherein a charging power supply can automatically provide charging current for the battery pack to be charged through the power input module and the charging control and detection protecting module under control of the CPU module, and the CPU module and the balance charging detection control module can achieve intelligent balance charging of the battery pack to be charged by detecting voltage of each single battery of the battery pack to be detected in real time. The quick balance charging device disclosed by the invention has the beneficial effects that cascading balance charging and CPU module intelligent control are utilized, so that balance time is effectively reduced; the quick balance charging device is adaptive to a battery pack formed by arbitrarily multiple single batteries with different types; thus, inconsistency generated in a manufacturing and using process of the single batteries is relieved, and whole performance and charging safety and reliability of the serial battery pack are improved.