This study investigate the tracking error of the two A shares which are listed on the Hong Kong Stock Exchange since the underlying ETF, namely ,based on RQFII traded funds issued upon the physical presence and the original synthetic ETF. In empirical study, in addition to using tracking error test verify the ETF and the underlying index to track the target effect; and further to apply panel regression model to evaluate the factors of affecting tracking error. The empirical results show that, following the A-share market, HKEx ETF, tracking replication capabilities are very good, especially in the short-term follow effect; while further analysis of the tracking error of the trading frequency and find that volume is the most significant factor in affecting the tracking error .