In the noise reduction system of high-speed railway, concrete sound barrier is becoming more and more popular because of its good noise reduction effect, low cost and convenient construction. The selection of shell material and structural design are the key to making high strength lightweight concrete acoustic barrier unit plate. In order to improve the bending strength of the sound barrier unit plate of high-speed railway in typhoon area, the shell material is made of steel fiber high performance concrete. Through calculation, test and construction factors, the minimum wall thickness of the acoustic barrier unit plate shell is 25mm, and the partition is removed from the inner cavity. The finite element analysis results show that the maximum tensile stress of the shell is lower than the tensile strength of the steel fiber high-strength concrete material 9MPa under the most unfavorable working condition -- the backplane under the bending load of 7.0kPa. The experimental performance study shows that under the bending load of up to 8.0kPa, the unit plate does not crack and the mid-span deflection is small. The noise reduction coefficient of the unit board is 0.75, and the volume isolation is 40dB, which is better than the required standard. The research shows that the unit plate has low weight, the strength meets the flexural performance requirements of high-speed railway in typhoon area, and the sound-absorbing performance is excellent.