It can be said that Xiaowan Hydropower Station is unique in the construction of similar projects in terms of the complexity of engineering geology, the difficulty of slope protection and the arduous construction task. This paper mainly introduces and analyzes the construction of the 2# mountain beam rescue slope project and the special construction technology adopted in the construction for extremely complex geological conditions, focusing on the drilling construction technology and method of eccentric drilling with pipe drilling and double pipe relay drilling, and the author's construction in order to solve the problem of no wind running and no leakage of large cracks at different depths in the hole At the same time, the author puts forward some improvement suggestions on the imperfections still existing in the rescue engineering design, hoping to play a role in promoting the faster development of geotechnical anchoring engineering technology in our country.