The utility model discloses an intermittent fertilization mechanism for sugarcane planting, which comprises a fertilization bracket mounted on a walking mechanism; the fertilizer box is arranged on the fertilization bracket; the fertilizing device further comprises at least one fertilizing unit arranged on the fertilizing support, each fertilizing unit comprises a fertilizer feeding groove formedin the fertilizing support, and a fertilizer box outlet is formed in the position, above one end of the fertilizer feeding groove, of the lower end of the fertilizer box; a fertilization outlet is formed in the other end of the fertilizer feeding groove; the feeding rotating shaft is rotatably arranged in the fertilizer feeding groove, and the feeding rotating shaft is driven by a feeding drivingmechanism to rotate; a spiral blade is arranged on the feeding rotating shaft; the material blocking plate is arranged at the position, corresponding to the fertilization outlet, of the fertilizer feeding groove, and the material blocking plate is driven by a material blocking driving mechanism to intermittently open and close the fertilization outlet. According to the utility model, materials arefed through the spiral blades, and the fertilization outlet is intermittently opened and closed through the striker plate, so that uniform and intermittent fertilization is realized.