  Magnetic reconnection is a fundamental physical process in various
astrophysical, space, and laboratory environments. Many pieces of evidence for
magnetic reconnection have been uncovered. However, its specific processes that
could be fragmented and turbulent have been short of direct observational
evidence. Here, we present observations of a super-hot current sheet during
SOL2017-09-10T X8.2-class solar flare that display the fragmented and turbulent
nature of magnetic reconnection. As bilateral plasmas converge toward the
current sheet, significant plasma heating and non-thermal motions are detected
therein. Two oppositely directed outflow jets are intermittently expelled out
of the fragmenting current sheet, whose intensity shows a power-law
distribution in spatial frequency domain. The intensity and velocity of the
sunward outflow jets also display a power-law distribution in temporal
frequency domain. The length-to-width ratio of the current sheet is estimated
to be larger than theoretical threshold of and thus ensures occurrence of
tearing mode instability. The observations therefore suggest fragmented and
turbulent magnetic reconnection occurring in the long stretching current sheet.
