The invention discloses a folding and bonding integrated mechanism for an inner core of a filter. The mechanism comprises a paper folding mechanism and a gluing mechanism; the paper folding mechanism and the gluing mechanism are both arranged on a frame; the paper folding mechanism includes two sets of thick support rollers and two sets of fine support rollers; tooth plates are respectively arranged on the outer walls of the thick support rollers and the fine support rollers; one set of thick support rollers is in tooth connection with the fine support rollers; the other set of thick support rollers is also in tooth connection with the fine support rollers; gaps are reserved among the tooth plates on the two sets of thick support rollers; a speed reducer for driving the thick support rollers and the fine support rollers to rotate is arranged out of the frame; a stand column is arranged between the two sets of thick support rollers; the gluing mechanism is fixed on the stand column, and includes a cross beam; a chute is formed in the cross beam; a slide block capable of sliding in the chute is arranged in the chute; and a glue injecting head is arranged on the slide block, and is positioned between the gaps of the two sets of thick support rollers. The mechanism is novel in design and simple in structure, uses the rack-shaped support rollers for folding the inner core, performs folding and direct bonding, saves both time and labors, and is excellent in practicability.