With the transformation of global energy structure and the rapid development of intelligent technology,smart grid has become the key to the modernization of power system.The application of power communication technology in smart grid not only supports the efficient transmission of information,but also ensures the safety and reliability of grid operation.The article briefly outlines smart grid and power communication technology,analyzes in detail the importance of the application of power communication technology in smart grid,and explores in depth the specific application of power communication technology in smart grid.This study aims to demonstrate the importance of power communication technology in modern smart grids and provide practical theoretical references for researchers and engineers in related fields.