Abstract: Tea plantations in hilly mountainous areas are plagued by underdeveloped mechanization techniques which present challenges relating to large tea garden management machines being bulky, having poor maneuverability and high maintenance costs. On the other hand, small tea garden management machines face challenges such as insufficient power and unqualified plowing depth. To this regard,an integrated machine for trenching, fertilizing and mulching in line with the operation of tea plantations in hilly mountainous areas was designed. The working principle of the machine was introduced, and the key components such as furrowing parts, fertilizer application mechanism and imitation trapping depth device were designed. The design and working process of the furrowing tool were analyzed to determine the structural requirements needed for effective fertilizer application and mulching as well as to meet the agronomic requirements. The power consumption and working mechanism of the whole machine were analyzed to determine the power requirements to meet the working conditions in mountainous areas. The field test results showed that the machine had an open furrow depth of 138-149.8 mm, with an average furrow depth of 145.5 mm, an open furrow depth stability coefficient of 90.07%-92.21%, and an average plowing depth stability coefficient of 91.1%. The average fertilizer application volume of each section was 21.6 g, the coefficient of variation of fertilizer uniformity was 3.4%, and all its key performance parameters met the agronomic requirements of tea plantations.The design scheme is reasonable and can operate stably and efficiently.