Bulky azole ligands in combination with PdCl2 provide three new palladium(Ⅱ) complexes.All these complexes,as pre-catalysts,have high catalytic efficiency for the Suzuki-Miyaura cross-coupling reactions of sterically hindered aryl chlorides and good to high yields are obtained with low catalysts loadings (0.1 mol％) under mild conditions in air.