The laws of fluctuations in high energy heavy ion collisions were studied with the multiplicitydistribution of EMU01 international collaboration. The dynamical factors d q and their ratios D q≡d q/d 1 were introduced to measure dynamical fluctuations quantitatively, and power scaling law between D q and D 2 was obtained. The exponents in the scaling were shown to be power scaling with q -1, and the scaling exponent γ was...