The present invention relates to a method for planning a 3D printing path of a continuous fiber reinforced composite material, belonging to the overlapping fields of composite materials and additive manufacturing. In the present invention, the stress distribution of a member under the action of a load is simulated and analyzed by means of a finite element simulation technique, and a printing path for the additive manufacturing of the continuous fiber reinforced composite material is planned according to the stress distribution direction and transfer characteristics of the member and the characteristics of fibers being continuous. Compared to a traditional path planning method, the method for planning a 3D printing path of a continuous fiber reinforced composite material proposed by the present invention can, in a targeted manner, adjust the orientation of continuous fibers, improve the bearing capacity of a member to the utmost extent, and can reduce the amount of fiber materials used and reduce the cost of manufacturing the continuous fiber reinforced composite material, thus realizing the high-performance, high-efficiency, high-precision, low-cost 3D printing and formation of the continuous fiber reinforced composite material.
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