Abstract: Based on the blasting engineering of the soft rock tunnel of Hangzhou-Shaoxing-Taizhou High-speed Railway, targeting the feature that under-passing sensitive buildings has high vibration control requirements on tunnel blasting, from test section vibration test results, the high risks faced with three-step method blasting excavation scheme are analyzed. The construction scheme of vibration reduction of smooth blasting with double sidewall heading method is elaborated. Parameters such as the cutting method, blasting hole spacing, minimum resistance line, excavation footage and charge of the left and right sides and middle drift headings are reasonably and scientifically calculated. Field blasting vibration test results show that double sidewall heading method smooth blasting vibration reduction construction scheme can control the on-site ground blasting peak vibration velocity between 0.21 cm/s and 1.46 cm/s. Vibration reduction result is evident, which not only meets the vibration control requirements of the building, but also has good smooth explosion effect.