There are not many options -
1. temporary disable Physics behavior when you don't need collisions
2. use different objects instead of instances of the same object.
3. use Chipmunk.
Thank you for your reply. option 1,2 not suitable for my game.
I tried chipmunk, I received poor performance than box2d.
100%CPU (chipmunk ) vs 55%CPU box2d (on mobile). (compare 350 physic objects )
It's not good for mobile so I use box2d.