Whats the difference between jumping and hitting (kicking) the ground, in both situations the normal force has the same direction, so why when we hit the ground the ground wont push us back, according to f=ma, When we hit the ground there is more force than when we jump also both normal forces have the same direction but still earth doesnt push us back.
The ground does push you back when you hit the ground. Try it. Swing your fist at the ground and you'll see it recoil.
Of course you won't experience as large a recoil as when you jump on the ground, but that's because you exert a much larger force when you jump (it's your entire body mass after all).