A silica-supported poly-γ-diphenylarsinopropylsiloxane palladium(0) complex was prepared by treatment of poly-γ-chloropropylsiloxane with potassium diphenylarsenide in THF,followed by palladium chloride in acetone,and then the reduction with hydrazine hydrate in ethanol．The X-ray photoelectron spectroscopy(XPS) was used to characterize the palladium complex．It was found that the title complex is an efficient catalyst for the cross coupling reactions of aryl halides with olefins,acetylenes and Grignard reagents．This polymeric palladium (0) complex catalyst is stable and can be reused without noticeable loss of activity．Hence this paper presents a simple and practical method for the synthesis of stilbenes,arylacetylenes and biaryls.