The invention discloses a device for removing ink on paper with laser and an implementation method thereof. The device comprises a paper ink removing device body, wherein a first paper feeding mechanism, a paper carrying mechanism, a locating mechanism, a scanning mechanism, a laser ink removing mechanism, a powder removing mechanism, a second paper feeding mechanism and a paper loading mechanism are arranged on the paper ink removing device body; paper is fed on the paper carrying mechanism at intervals through the first paper feeding mechanism; an ink region on the paper is scanned through the scanning mechanism; then the laser is emitted through the laser ink removing mechanism so that ink molecules are separated from paper fiber so as to remove the ink on the paper; and then powder generated by the laser ink removing mechanism is removed and output into the paper loading mechanism. The paper is prevented from being damaged by removing the ink on the paper with laser, so that the purpose of waste paper reuse is achieved.