A new view of limited arbitrage is applied in the study of the reasons of stock price synchronicity in China based on the behavioral finance theory. This paper made an explorary study about the relation between limited arbitrage, stock price synchronicity and market efficiency. A conclusion different from the study about cash stock dividends in foreign countries is derived that cash dividends as a tunnel of dominant strockholders increase the holding cost of arbitragers, and affect stock price synchronicity, leading to low market efficiency.