Abstract. According to the natural rubber deep fertilization ditch depth of 10~30cm between the width of 30~40cm between the requirements,we developed a fine ditch fertilizing machine. This paper introduces its structure and principle in detail. The machine uses a hoof-shaped furrow structure and centrifugal fertilizer structure. The machine is simple and easy to maintain. After testing, the machine can open the groove width of 20cm deep 35cm width.The machine fertilizer uniformity up to 90%.The machine productivity reached 1.3 hm 2 / h. The machine which meets the requirements of rubber tree fertilization has stable performance. At the same time, the machine can be the human's workload.