collider changeable

How can i make my collider change with every animation that i have ?

So there are a number of answers to that - I’m presuming you mean on a 3D character of some description:

a) Use a mesh collider - but mesh colliders are a little limited.

b) Create primitive colliders (box, sphere, capsule) on empty game objects, parent them to the bones of your characters rig at the appropriate place and size and move them to make a good approximation of the shape of the geometry.

c) If you just want a volume to change in size - add the size changes to the primitive collider you use to the animation clip for your character.