To investigate the seismic performance of the monolithic precast concrete wall with concealed steel plate bracing, a two-story monolithic precast concrete wall with concealed steel plate bracing and a benchmark two-story cast-in-situ wall with the same bracing were designed and constructed. The bracings in the precast wall were connected by welded joints at the wall-to-wall and wall-to-foundation connections to fit the larger construction tolerance. Cyclic loading tests were conducted on the walls. The results indicated that the bracings in the precast wall connected by welded joints were able to satisfy the large construction tolerance requirement and transfer the internal force well. The seismic performance of the monolithic precast concrete wall was emulative to the cast-in-situ wall in terms of the lateral strength, stiffness degradation, and energy dissipation. Both of the walls were failed in flexure, but the monolithic precast wall formed an additional plastic zone at the top interface of the post-casting segment.