Express highways have been built in the loess area of Shaanxi Province.Research on plant protection for loess cutting slope of highway is one of the important problems that are being studied recently.Based on it,the main styles of plant protection for loess cutting slope of highway built and being built are analyzed and plant protection effects for the loess high-cutting slope are discussed.At the same time,the major problems existed in plant protection are analyzed so that the conclusions can be referenced for the loess cutting slope during the highway construction in other loess areas.