Abstract: According to the plane mirror imaging principle ,a method which based on the outline of the silhouette of a single image to create the visual hull is proposed. The method uses angled plane mirror system to simulate multi camera shooting at the same time, it can get the corresponding camera parameters to realize the 3D reconstruction of the object by analyzing the epipolar geometry relationship between each silhouette. Experimental results show that the method is simple and effective, and can reconstruct the 3D shape of the target object without the calibration result obtained through special laboratory instrument. And the method has extensive practical value.