The invention discloses a magnetic resin recovery device and recovery method. The magnetic resin recovery device comprises a resin catcher (10), a material punching device (13) for stripping the caught resin and a resin recovery trolley (3); the resin catcher comprises an upper frame (10-1), a permanent magnet (10-2) and a lower frame (10-3) which are integrally connected to form a resin capture frame (11); the permanent magnet consists of a plurality of magnetic rods and provides a magnetic field of not less than 8000 Gauss in the space range occupied by the whole resin catcher; and the resincatcher is arranged in a first working state in a water outlet channel (7) through an electric hoist (2) and a second working state separated from the water outlet channel. The magnetic resin recovery device greatly reduces the resin loss rate; after the resin is magnetized, the performance is enhanced, and the service life is prolonged; the economic cost of treating water is reduced; the magnetic resin recovery device is small in floor space and only modified on the basis of the original water outlet channel; and the magnetic resin recovery device is high in automation degree, and manual operation errors are avoided.