  We investigate the pressure evolution of the anomalous Hall effect in
magnetic topological semimetal Co3Sn2S2 in diamond anvil cells with pressures
up to 44.9-50.9 GPa. No evident trace of structural phase transition is
detected through synchrotron x-ray diffraction over the measured pressure range
of 0.2-50.9 GPa. We find that the anomalous Hall resistivity and the
ferromagnetism are monotonically suppressed as increasing pressure and almost
vanish around 22 GPa. The anomalous Hall conductivity varies non-monotonically
against pressure at low temperatures, involving competition between original
and emergent Weyl nodes. Combined with first-principle calculations, we reveal
that the intrinsic mechanism due to the Berry curvature dominates the anomalous
Hall effect under high pressure.
