The selection of pile hammer specifications for power piling is an important and complicated link in pile foundation construction，and the ultimate bearing capacity of pile foundation design is the main factor to be considered.The common methods for hammer selection include formula calculation，empirical comprehensive analysis，and the wave equation method，which can select the hammering energy and ultimate bearing capacity of pile hammers.The analysis of hammer selection elements can lead to the minimum energy value of hammer selection，which extends from the traditional single hammering energy to a range.This simplifies the method of hammer selection and improves the piling efficiency.From the perspective of hammering energy efficiency and efficiency，this paper analyzes the reason why the hammer-to-pile mass ratio should not be less than 14，namely that the hammering energy efficiency would be significantly reduced.In this way，power piling and static pressure piling are related in theory.