Shear walls are important lateral force-resistant components of high-rise building structures. To study the reliability of precast walls with openings connected by grouted sleeve lapping connectors named APC connectors （all vertical members precasted in concrete structures）， pseudo-static tests were carried out on a cast-in-place wall and two precast unequal-limb walls with an opening in which vertical reinforcements were spliced by type-Ⅰ and type-Ⅱ APC connectors. The failure modes， hysteretic behaviors， characteristic loads， deformations， strains of reinforcement and sleeve of the specimens， as well as the shear properties of bonded surfaces， were studied. The results showed that the crack development process of all specimens was basically the same， and the bending shear failure occurred in the wall limb and the coupling beam. The damage to the cast-in-place wall began at the bottom of the wall limb， while the concrete above the sleeve of the precast wall was crushed first. In addition， the failure of the outside of the wall limb of each specimen was more serious than the inside. The section at the top of the sleeve was the weak surface， and vertical reinforcements above the sleeve were prone to buckling in the failure stage， which should be strengthened during the design of the stirrup of the component. The crack load， yield load， and stiffness of precast walls were slightly higher than those of cast-in-place walls， and the peak load and strength degradation coefficient were similar， but the ductility was slightly worse. At the same loading stage， the energy dissipation capacity of all specimens was similar. The grouting joint surface of the precast walls showed reliable shear resistance， and both APC connectors can effectively transfer reinforcement stress in the precast walls. The precast shear wall with an opening spliced by APC connectors can achieve the seismic performance equivalent to the cast-in-place wall.