According to the traditional multiscale compressed sensing(MCS) scheme,only a few of wavelet coefficients are sampled and the others are set to zero,which results in the coarse edges of the reconstruction images and low reconstruction accuracy.In order to overcome this conundrum,an improved multiscale compressed sensing(IMCS) scheme is proposed.Based on the reconstruction image achieved by MCS,the IMCS scheme interpolates the image with contourlet transform.In this way,the sampled wavelet coefficients are kept while the unsampled wavelet coefficients are estimated.The edges of the images reconstructed by IMCS become smoother and the mosaic effect is reduced.The validity of IMCS is proved by the experiments which show that IMCS has better reconstruction accuracy compared with MCS.