Abstract: In order to realize the automatic and intelligent operation of cuttage and film covering multi-functional machine for low tunnels under different planting methods, a machine vision navigation path detection algorithm is proposed for direct seeding and seedling transplanting planting methods.Firstly select the implant method in the main screen of the image processing system, then the number of parity of plant rows in the image was detected by the gray-scale peak method, and then a navigation path detection algorithm based on the center of mass of the seed sowing area as a feature point is proposed for the direct seeding planting method.Then, for the seedling transplanting planting method, the boundary is obtained with the segmented crop as the object, and the midpoint of the boundary is calculated row by row as the feature point to fit the navigation line.100% accuracy in determining the parity of planting rows for direct seeding and seedling transplanting planting methods, and the average time spent is 0.031 s; the accuracy of navigation path detection under direct seeding planting method is 95%,and the average time spent is 0.3 s; the accuracy of navigation path detection extracted from seedling transplanting planting method is 97%, and the average time spent is 0.37 s.The navigation path detection algorithm proposed in this paper is highly versatile and provides reliable navigation paths for the small arch insert mulching machine.