In order to avoid the problem that the pile frame fracture may occur during the operation of floating pile driver, it is necessary to check the structural strength of pile frame base. According to the relevant China Classification Society (CCS) rules, a finite element model of reinforced structure of positioning pile base in a certain floating pile driver is established with the finite element software, and the finite element analysis of structure strength under two conditions of navigation and operation status is made, so as to obtain the relevant stress situation and make the research and analysis. The results show that the strength of reinforced structure of positioning pile base meets the requirements of relevant CCS rules.