With the acceleration of the block district in China, it is necessary to carry out research on the traffic noise propagation model of the block district. In the paper, we exploited the acoustic principle to discover the propagation law of traffic noise from two aspects: attenuation and propagation correction. When studying traffic noise attenuation laws, it’s considered the attenuation of ground absorption and distance, and established the acoustic reflection attenuation equation. For traffic noise propagation research, it’s recalibrated the value of the road type and finite length section. Besides we carried out experiments in view of the serious horn phenomenon in the block community and provided correction values under different horn times. We used Xuanqing Community as an example, the results showed calculation error was within 1.5 dB. These results explained the applicability of the influence factors in the block district. Keywords: block district; traffic noise; propagation; attenuation

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