With the large number of applications of power electronic equipment in power grids, the problem of harmonics in the system has become increasingly prominent. As an important means of harmonic analysis, harmonic power flow calculation occupies an important position in the power system. The paper expounds the specific process of certainty harmonic power flow calculation and uncertainty harmonic power flow calculation method, analyzes the advantages, disadvantages and scope of various methods, and summarizes the new challenges faced by harmonic power flow calculation in modeling and methods in the face of the development of new power systems, hoping to provide reference for subsequent related research.