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The multi-drifting subpulse behaviors in PSR J2007+0910 have been studiedcarefully with the high sensitivity observations of the Five-hundred-meterAperture Spherical radio Telescope (FAST) at 1250 MHz. We found that there areat least six different single emission modes in PSR J2007+0910 are observed,four of which show significant subpulse drifting behaviors (modes A, B, C, andD), and the remaining two (modes $E_1$ and $E_2$) show stationary subpulsestructures. The subpulse drifting periods of modes A, B, C, and D are $P_{3, A}= 8.7 \pm 1.6 P$, $P_{3, B} = 15.8 \pm 1.2 P$, $P_{3, C} = 21.6 \pm 1.3 P$ and$P_{3, D} = 32.3 \pm 0.9 P$, respectively, where $P$ represents the pulseperiod of this pulsar. The subpulse separation is almost the same for all modes$P_2 = 6.01 \pm 0.18 ^\circ$. Deep analysis suggests that the appearance andsignificant changes in the drifting period of multi-drifting subpulse emissionmodes for a pulsar may originate from the aliasing effect. The observednon-drifting modes may be caused by the spark point move with a period ~P_2.Our statistical analysis shows that the drift mode of this pulsar almost alwaysswitches from slower to faster drifts in the mode change. The interestingsubpulse emission phenomenon of PSR J2007+0910 provides a unique opportunity tounderstand the switching mechanism of multi-drift mode.

Investigating the multi-drifting behavior of subpulses in PSR J2007$+$0910 with the FAST