With the rapid development of UAV technology, automatic mission planning systems have received extensive attention, and path planning, as an important technology in this field, has attracted many scholars to study. The article first introduces the mathematical model of UAV path planning, including objective function and constraint conditions; then focuses on the current research progress of UAV path planning algorithms, and summarizes the advantages and disadvantages of some commonly used optimization algorithms and future research Key points; Finally, the research difficulties and future research direction of UAV path planning are analyzed.