Wood chip sound barriers are divided into pure sound insulation reflective sound barriers and composite sound barriers that combine sound absorption and insulation. The latter is more effective in sound insulation. Most sound barriers use a combination of sound absorption and insulation products, which are characterized by targeted control of the generation and transmission characteristics of road noise. For example, the sound of cars rubbing against the road or locomotives rubbing against the track is located at the lower part of the road, and the sound has the characteristic of being diffracted through the upper part of the screen. Therefore, a structure with upper and lower sound absorption and middle sound insulation is adopted in the design, which can effectively reduce the diffraction of noise. A transparent reflective sound insulation plate is used in the middle of the sound barrier, which can effectively interrupt the transmission path of sound waves; It also provides drivers and residents with an open view environment.