Based on the survival analysis theory，we split the effects of market characteristics on the trading intensity into a transitory (uninformed) and a permanent (informed) component． We test the effects of market status on informed and uninformed trading using the high frequency data of 10 liquid stocks and 10 illiquid stocks of SSE． These data cover from June，2006 to September，2006． Our results show that，when trading volume increases，the trading intensity of informed (uninformed) trading increases (decreases) in the two markets． When the spreads increase，the trading intensity of informed (uninformed) trading increases (decreases) in the liquid market，while the trading intensity of informed (uninformed) trading decreases (increases) in the illiquid market． Moreover，we observe that the informed trades are highly persistent in the two markets，but that the uninformed trades respond negatively to the informed trades in the liquid market and the uninformed trades respond positively to the informed trades in the illiquid market．