Navigation path planning of agricultural machinery is the key technology in automatic navigation, which has been widely used in the process of plowing, planting, managing and harvesting automatic navigation in recent years. A review of the current situation and research progress in agricultural machinery navigation path planning was presented, focusing on the global path planning and local path planning, respectively. Global path planning focused on full coverage path planning and global point-to-point path planning, and the research results and specific applications in precision operation, agricultural transportation and agricultural machinery cross plot scheduling were summarized. Local path planning focused on obstacle avoidance path planning and local tracking path planning. Due to the complexity and spatiotemporal variability of agricultural operation environment, the focus of local path planning research was real-ime, high efficiency, robustness and security of the algorithm. Finally, it is pointed that the future research focus of navigation path planning technology: standardizing and sharing of the data resource; improving of the environmental information perception and analysis; enhancing of the real-time dynamic planning; incorporating of the agricultural machinery characteristics.