  There are some similarities between bursts of repeating fast radio bursts
(FRBs) and giant pulses (GPs) of pulsars. To explore possible relations between
them, we study the cumulative energy distributions of these two phenomena using
the observations of repeating FRB 121102 and the GPs of Crab pulsar. We find
that the power-law slope of GPs (with fluence $\geq$130 Jy ms) is
$2.85\pm0.10$. The energy distribution of FRB 121102 can be well fitted by a
smooth broken power-law function. For the bursts of FRB 121102 above the break
energy (1.22 $\times 10^{37}$ erg), the best-fitting slope is
$2.90_{-0.44}^{+0.55}$, similar to the index of GPs at the same observing
frequency ($\sim$1.4 GHz). We further discuss the physical origin of the
repeating FRB 121102 in the framework of the super GPs model. And we find that
the super GPs model involving a millisecond pulsar is workable and favored for
explaining FRB 121102 despite that the magnetar burst model is more popular.
