The compressive light field (CLF) display using multi-layer spatial light modulators has the advantages of high space bandwidth utilization rate and good image resolution.It is a promising light field display technology.The traditional method regards the light field decomposition as an overdetermined problem and uses the optimization algorithm to solve it.However,with the improvement of the resolution,depth,viewing angle,and other parameters of the reconstructed light field,the disadvantages of the optimization algorithms,such as low computational efficiency and large memory consumption,are magnified.It is difficult to realize fast computation. To address the issues,this paper proposes a new CLF decomposition algorithm.It decomposes the original light field into object points for storage which only occupies a small amount of memory;It uses depth weight and weighted average algorithm to replace the optimization algorithm of the CLF,which dramatically improves the calculation efficiency.Under the same conditions,the memory occupied by the proposed algorithm is only 38.8% of that of the traditional method,the calculation time is reduced by 93.7%,and the image quality is improved by about 1 dB.At last,the display effects of this method and the traditional method are compared through simulations and experiments,and the effectiveness of the algorithm is verified.