I want to pause a sprite ,which way should I use?

I believe SetSpriteActive() controls both animation and physics while the StopSprite() only effects the animation. So if you want to pause only the animation then use StopSprite(). If you want to stop both animation and physics, then use SetSpriteActive(false).

@Hodgey, I see. Thank you very much!

just to add that i think that setspriteactive also affects other properties of the sprite like collision (e.g. getspritehit) as well as physics...

@mr_d : Thank you!