  We present the analyses of intense X-ray flares detected on the active fast
rotator AB Dor using observations from the XMM-Newton. A total of 21 flares are
detected, and 13 flares are analysed in detail. The total X-ray energy of these
flares is found to be in the range of 10$^{34-36}$ erg, in which the peak flare
flux increased up to 34 times from the pre-/post-flaring states for the
strongest observed flare. The duration of these flaring events is found to be
0.7 to 5.8 hrs. The quiescent state X-ray spectra are found to be explained by
a three-temperature plasma with average temperatures of 0.29, 0.95, and 1.9
keV, respectively. The temperatures, emission measures, and abundances are
found to be varying during the flares. The peak flare temperature was found in
the 31-89 MK range, whereas the peak emission measure was 10$^{52.5-54.7}$
$cm^{-3}$. The abundances vary during the flares and increase by a factor of
$\sim$3 from the quiescent value for the strongest detected flare. The
variation in individual abundances follows the inverse-FIP effect in quiescent
and flare phases. The X-ray light curves of AB Dor are found to exhibit
rotational modulation. The semi-loop lengths of the flaring events are derived
in the range of 10$^{9.9-10.7}$ cm, whereas the minimum magnetic field to
confine the plasma in the flaring loop is estimated between 200 and 700 G.
