The Global First theory considers the global properties of objects could be described as topological invariants, with the earliest detection and highest priority in visual processing. The theory is supported by accumulating evidence in conscious vision, but remains unclear in implicit perception, the perception in the absence of awareness, whose mechanism and application have been studied a lot in cognition research for years. In the present study we probed into the processing of global properties in implicit perception by means of a variant of binocular rivalry called continuous flash suppression, in which our target stimuli were suppressed by dynamic mosaic noise patterns in order to achieve subconscious vision. The number of holes, a crucial topological invariant of an object, is the target of this study. In Exp1, the disk, the S and the O shape were used as target stimuli, the shapes might change or not after being suppressed, subjects reported the breakthrough of suppressed figures by keypress, we measured the suppression time of the figures, and found stimuli of topological changes(changes of numbers of holes in stimuli) took significantly less time to get into dominance, comparing with those of non-topological changes or unchanged. In Exp2, disks with different amount of holes or similar arcs were used as target stimuli, subjects were required to perform a 2AFC task after a 3s display in which the suppressed figures might be presented in the upper or lower visual field, the detection accuracy were compared, which indicated that the topological changes have a higher chance to be detected during suppression. The result strongly supported Global First in implicit perception, and revealed the high priority of topological properties in human visual processing, meanwhile it suggested the possible subcortical visual processing of topological properties.