Traditional materials of preparing white LED are blue chip and yellow YAG,b ut they have a low CRI and lack of red component.In this paper,hyperfluore scence materials of 4CzTPN-Ph with the mass fractions of 1%,2%,3%,7% and 11% are mixed by adding YAG phosphor to preparate white LED.With this method,the device spectrum is optimized and the CRI is improve.The performance of white LED wi th each parameter is analyzed. The experiment shows that 4CzTPN-Ph can be excited by the blue light at 445nm from the LED chip.With the increase of doping concentration,a stronger red emi ssion near 600nm is observed.When the 4CzTPN-Ph is mixed with mass fraction of 7%,th e red peak is the strongest,and spectrum broadening effect can be observed at the same time.So the hyperfluorescence material 4CzTPN-Ph is able to be filled in the missing re d spectral components.When the 4CzTPN-Ph is mixed with mass fraction of 11%,the highest CR I of the prepared white LED can reach 87.3%.