The correct calculation, design and application of the mooring forms which commonly used in CALM single-point mooring systems are of great importance for major offshore projects construction. This paper focuses on the two main mooring methods, fluke anchor and suction anchor, analyzes their applicable environmental conditions and law by theoretical calculations，presents the installation process and action mechanism in the form of pictures and tables, summarizes and compares their advantages and disadvantages in practical applications. An auxiliary analysis software was designed by using Visual Basic and the reliability of the program was verified by engineering cases, fulfills high requirements on the safety, stability and economic applicability of mooring systems proposed by the projects