Abstract: A simplified noise prediction model for urban rail transit elevated line is presented, which could distinguish the influences of different noise sources, classify the total sound level of the acoustic points into a superposition of line direct sound, bridge structural noise, reverberation sound and ground radiated sound, the prediction formula of each noise is give respectively. Compared with the predicted and tested noise values of actual lines, the calculation accuracy of the simplified prediction model model is proven to meet the prediction requirements of rail transit elevated line noise.