Abstract: The reliability and performance of LED largely depend on junction temperature, which increases the junction temperature of the LED chip, which will reduce the life of the chip and degrade its performance.This paper establishes the simulation model of 1W LED beads for heating element.Based on the finite element method and ANSYS software, the temperature distribution under steady state is obtained.The simulation results under rated working conditions are compared with the measured temperature.The difference is within the allowable error range, which verifies the reliability of the model.The simulation results can accurately reflect the temperature of the LED beads.