Non-line-of-sight imaging techniques can be used to capture images of objects that are hidden away in corners, and this technology has many useful applications. The captured signal is insufficient when the laser sends laser light to the intermediate surface, which is a problem when utilizing a digital micromirror device (DMD) in a confocal non-line-of-sight optical route because of the spectroscopic impact of the DMD. In order to increase the signal-to-noise ratio of the echo signal, the acquisition method of spatial multiplexing detection (SMD) is introduced into the confocal optical path in this study. SMD is integrated with the reconstruction algorithm of the light-cone transform (LCT). Based on the confocal non-line-of-sight imaging optical path, the laser initially emits laser pulses, followed by SMD collecting concealed object echoes, and the LCT algorithm concludes the reconstruction. The experimental results demonstrate that the single-pixel camera can complete the reconstruction using the LCT algorithm after employing the SMD acquisition method in the confocal non-line-of-sight optical route, which may improve the signal-to-noise ratio and the reconstruction quality.