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In order to solve the problems of poor soil throwing performance, high power consumption and no special blade, a cutting and throwing combined ditching blade was designed for tea garden ditching. The dynamic analysis of the soil throwing process of the soil throwing lump determined that the key parameters of the soil throwing lump were 8cm wide and the tilt angle was 30°, and the soil throwing blade could meet the requirements of tea garden ditching that the soil could be evenly distributed to the edge of the ditch instead of falling into the ditch, which was convenient for filling soil after fertilization and the ditching energy consumption could not be too high. The results of experiment showed that the width of single side throwing soil by the combined blade was 22.7cm, the uniformity of throwing soil was 90.3%, the thickness of covering soil was 2.1cm, the stability of ditching depth was 87.8%, and the thickness of floating soil at the bottom of ditch was 1.2cm, while that of the control group was 13.4cm, 84.3%, 2.4cm, 82.3% and 2.5cm, respectively, which indicated that the throwing distance of the combined blade was better than that of the single blade, the same as uniformity of throwing soil and planting stability, and the thrown soil by the combined blade was not easy to fall into the ditch. In addition, the combined blade did not significantly increase the power consumption. The results of power consumption analysis showed that compared with the single cutter, the impact force of the front and rear area of the combined blade was reduced, and the impact force of the upper area of the throwing soil was reduced, so the total impact force of the throwing soil was reduced.