Abstract: A technique of space-coded multiplexing speckle was proposed to simultaneously obtain multiple objects' information by a single-pixel detector. Space-coded multiplexing speckles were employed for objects illumination. The mixed light reflected from the objects was detected by a single-pixel detector. An iterative reconstruction method was used to restore the fused image. The spatial coding information was used to decode multiple objects' information. Next, clear images of the different information were recovered by compressed sensing (CS) algorithm. Multi-space, multi-spectral and multi-polarization information were simultaneously obtained through the proposed technique, respectively. The results clearly demonstrate that the proposed method is effective. This method can effectively reduce the amount of detected data and improve the imaging efficiency.