The blasting construction of the open cutting rock for channels has the characteristics of high safety requirements and its construction process must be strictly controlled.Before construction, the professional blasting design is required.And after specialist demonstration and blasting tests,the blasting construction can be carried out.The design and construction for the blasting on the open cutting rock of the east canal Ⅱ bidding of the second phase project for Liaofang Irrigation Area is introduced in this paper.