In the off-axis digital holography for detecting the ultra-fast phenomenon or obtaining the optical tomography information, the interference fringes are formed in a limited region due to the low coherence length of the light source, resulting in a corresponding decrease of the detected area of the object wavefront. A new recording method based on spatial angular multiplexing for enlarging the detected area in the above situation is proposed, in which multiple interferences between the object and the reference waves are simultaneously carried out by the spatial angular multiplexing. An image plane pulsed digital holographic system with two references based on spatial angular multiplexing is set up in the experimental system. The full-field reconstruction image can be obtained by fusing the two separately reconstructed parts of the images into a complete one. The experimental results demonstrate the validity of this method.