For there are many various and having different effect questions in the plant defence system with soil and water conservation on highway side slope in our country, we can cite the Luojie highway,to introduce the project for defending soil and water loss on highway side slope with plants,we carry out the analysis about the benefit in the base of adopting false stimulance about the rainstorm and runoff that have the 1% frequence. We think the project can be used for reference by other comrades of Henan and the vicinal regions when they design the defence system with plants on the highway side slope. To ensure the high quality,we deem the defence system with plants should be vigorously advorcated,and then the system of inviting public bidding and supervise should be spreaded.