It can't emit particles with animation node The emitter can emit particles when it's not connected to animation node. but when I connect it to the animation node with position transforming, the particles can't fly, they all are stick to the emitter object.

Anything I missed or any suggestion? thanks.
Blender's particle system integrator resets the simulation every time an unexpected change in the object's transformation happen. Try moving the object mid-simulation and you will find that the particles resets. As far as I know, to work around this, you need to bake the animation into key-frames so that Blender's know about the transformation in advance.