Phosphor-converted white LEDs have the advantages of high energy efficiency, low cost, and long life. They are widely used in lighting area. Improving the luminous efficiency of phosphor-converted white LEDs has always been a research hotspot. In order to design and optimize the high-performance packaging of white LEDs, combination of simulations and experiments are used to research and analyze LED chip packaging. We use a special bracket and dual-chip package to increase luminous efficiency. On this basis, the phosphor coating process is improved, the phosphor excitation efficiency is improved, and the overall LED luminous efficiency is increased by about 6%. This study also investigates the change in LED luminous efficiency when the distance between the remote phosphor and chip changes.