The invention provides a gradual terrace transformed method for a dry hillside field of sisal hemp in the dry and hot region, relates to the field of region water and soil maintenance, and specifically relates to the gradual terrace transformed improving method for the dry hillside field. The invention aims to effectively reduce soil erosion and form a long-term protective belt at the same time, achieves the gradual terrace transformed improvement of the dry hillside field in the dry and hot region, and develops and utilizes the improved regional field. The adopted technical scheme comprises the steps of determining a gradual terrace transformed scheme based on the geology and terrain characteristics, namely Torrid red soil or vertisols of a dry and hot rive valley, of the target zone, planting sisal hemp to form a sisal hemp biological barrier protective belt, and utilizing the rigid and anti-corrosion feature of sisal hemp leaves to form a partition net of water-sand on slopes, which is the key technical step; according to targets of related regional treatment or development, gradually cultivating protective terrace edges, meanwhile, achieving gradual terrace transformation of the dry hillside field in the dry and hot region through depending on the transporting effect of natural water erosion and the effect of manual assistant management, constructing sisal hemp ecological barrier protective edges of the treatment region target terrace, and forming an efficient, economic and long-term terrace transformed technique.