  We study the statistical properties of the soft gamma repeater SGR 1935+2154.
We find that the cumulative distributions of duration, waiting time, fluence
and flux can be well fitted by bent power law. In addition, the probability
density functions of fluctuations of duration, waiting time, fluence and flux
well follow the Tsallis $q$-Gaussian distribution. The $q$ values keep steady
for different temporal scale intervals, indicating a scale-invariant structure
of the bursts. Those features are very similar to the property of the repeating
fast radio burst FRB 121102, indicating the underlying association between the
origins of soft gamma repeaters and repeating fast radio bursts.
