The invention discloses a magnetic attraction type loose-leaf notebook inner core and a loose-leaf notebook. The inner core is absorbed to a magnetic functional shaft (2) of a magnetic attraction type envelope (1) through magnetic force to form the loose-leaf notebook; the inner core comprises a plurality of pieces of overlapped magnetic functional paper (3); a magnetic functional strip (31) is arranged on the edge of each piece of magnetic functional paper (3); each magnetic functional strip (31) is absorbed to the magnetic functional shaft (2) of the magnetic attraction type envelope (1) through the magnetic force. The inner core can be matched with the magnetic attraction type envelope to form the loose-leaf notebook, and is magnetically absorbed to the envelope through the magnetic force, so that lossless quick disassembly and assembly of a single loose leaf of the inner core are realized; the combination is convenient; time is saved; the single loose leaf is positioned accurately and firmly without waggling, and is convenient to read and write.