The invention discloses a rehabilitation device for preventing hand muscle atrophy and deformation and application thereof and belongs to the field of medical rehabilitation. The rehabilitation devicecomprises a thumb stall plate, an index finger stall plate, a middle finger stall plate, a ring finger stall plate and a little finger stall plate which correspond to the five fingers of the human body, the five stall plates are connected to a fixing plate corresponding to the hand back shape of the human body, the thumb stall plate, the index finger stall plate, the middle finger stall plate, the ring finger stall plate and the little finger stall plate are of structures corresponding to corresponding finger bones, and torsional springs are arranged at corresponding finger joint positions. The parts, corresponding to the hand finger bones, of the thumb stall plate, the index finger stall plate, the middle finger stall plate, the ring finger stall plate and the little finger stall plate are provided with permanent magnet blocks I and magnetic blocks I at intervals, a permanent magnet block II located on the rear side of the thumb stall plate and four permanent magnet blocks II respectively and correspondingly located on the rear sides of other four stall plates are arranged on the fixing plate, and the magnetic blocks I are identical in magnetic pole. The rehabilitation device candrive fingers to completely close upon, unbend and stretch and can achieve more comprehensive hand exercising.