Abstract: This paper briefly describes the related technical requirement of secondary grouting during the process of equipment installation in nuclear power projects.The method and procedure are introduced in detail from the aspects of acceptance,preparation,pouring,collecting and maintenance of the high-strength non-shrinking based pouring cement material,and the cautions during the construction is also provided.The factors affecting the quality of the field grouting is analyzed,and the measures to reduce or eliminate the micro-cracks during the process is provided.