Based on the experimental study of the flexural performance and shear performance of precast hollow-core slabs strengthened with HPFL, the ANSYS was applied to build the spatial finite element model to analyze the precast hollow-core slabs strengthened with HPFL. Further analysis was conducted for the HPFL strengthening surface mortar strength, HPFL reinforcement layer steel bar mesh size, HPFL reinforcement stripe width and the direction of precast hollow slabs and other factors on the precast hollow slabs shear performance strengthened with HPFL. The results demonstrate that finite element analysis results and the experimental results are basically identical and the effectiveness of HPFL as a kind of improved precast hollow slabs flexural resistance and shear resistance. The HPFL stripe width and the strengthening surface mortar strength have the most important influence on the strengthening effects. The ultimate capacity increases with their enlargement. The ultimate capacity increases slightly with the steel bar mesh size. HPFL can also improve the precast hollow slabs' shear bearing capacity of horizontal and vertical directions.