Maybe I finded the reason, I added a image with the Suffix "~~hd" to the project, then it runs well.
In cocos2d 0.9 , we can use only one image in both retina and normal mode by adding follow code.
But in 2.0, it doesn’t works. Is it a BUG?
The problem only happen while running in Instrument, I didn’t have the IDP yet, so I can’t test it in device.