With the rapid development of expressway, high-speed railway and urbanization in China, the innovation research of ecological restoration technology of engineering slope in our country has been promoted. Now, the ecological restoration technology of engineering slope soil, along with the vehicle equipment and road construction technology, has formed three major technical progresses of highway construction in China and attracted worldwide attention, which has become a support system to the “One Belt, One Road” strategy of major science and technology. The “two high” road construction in our country is at the expense of soil ecological environment destruction and results in a number of damaged bare slopes. Therefore, the ecological restoration and safety protection are very prominent. This paper discussed the following major issues: 1)The essence of soil ecological restoration; 2)Characteristics of soil ecological destruction in road slope; 3)How to select trees, shrubs and grass seeds and create the biodiversity of the plant community for the engineering slope;4)V groove planting technique for high steep rock slope; 5)Substrate configuration technology for spray mixing planting; 6)Mechanized construction technology for slope vegetation construction, etc. The concept to develop the industry of trees, shrubs and grass seeds and its key technology were also put forward.