A 35m high reinforced concrete water tower with the conical structure, located at Shuangbai Road, Caohang District, Minhang District, Shanghai, is surrounded by Pioneer Park and overhead pipelines, etc. Since the surrounding environments in the blasting area is relatively complicated, the collapse direction is limited, and it is also difficult to accurately control the collapse direction of the water tower, the blasting flying rocks and blasting vibration. In view of the structural characteristics of the water tower and the surrounding environmental factors, the isosceles trapezoidal blasting gap was made with a pre-cut triangle directional window, which played a decisive role in the accuracy of orientation; meanwhile, the passive protection method of laying yellow sand and straw bags, combined with the active protection method of the bamboo fence and safety net effectively controlled the impact of blasting vibration and flying rocks on the surrounding area, achieving good results.