Abstract: An exponential function is proposed as a load transfer function to analyze the load transfer mechanism of a super long single pile, considering pile's bottom settlement caused by friction around the pile. The exponential function is revised. According to the contrary analysis of results of static loading tests of a single pile with optimization, geotechnical parameters of the load transfer function of layered soil around the pile and under the pile bottom are obtained. A good agreement between calculation results and testing results of 3 super long single piles is found,showing that the revised exponential function can be used to analyze the load transfer of a super long single pile.