Compound minimal tillage land preparation technique is a key part of protective cultivation technology system.This articlepresents the design of a compound minimal tillage land preparation machine,including its structure and working principle.In particular,the author examines the structures and functions of the machine’s major parts.Practice shows that the newly designed machine cannot only meet the requirements of farming but also protect the environment.It is worthwhile to be promoted and applied practically.In order to meet the needs of agricultural implements matched with high-powered tractors, a broad width combined cultivating machine was design based on single and combined work of cultivating machines. The combined cultivating machine had the functions of stubble-breaking, rotary tillage and subsoiling. Single works and combined work were carried out. The experimental results showed that the machine could give full play to a operation efficiency of high-power tractor when working. The designed machine could reduce power consumption of tractor, and energy saving was about 14.3%.The designed machine belongs to energy saving of high efficiency machinery, and provides reference for studying on large agricultural implements.