Permanent magnet motor rotor permanent magnet assembling device and assembling method thereof

Provided is a permanent magnet motor rotor permanent magnet assembling device. The device comprises a positioning seat, a material box and a feeding guide die, and the feeding guide die is provided with an assembling groove, a pushing groove and a slitting discharging port. The assembling groove is aligned with a permanent magnet groove in a rotor core. The slitting discharging port and the assembling groove are formed in the two ends of the pushing groove; the discharge port of the material box communicates with the pushing groove and the communication part is positioned between the assembling groove and the slitting discharging port; the material box is provided with a feeding part; the width of the pushing groove is larger than or equal to the width of the product permanent magnet and smaller than the sum of the widths of the product permanent magnet and a spacer. A pushing assembly moving in a reciprocating mode is arranged in the pushing groove, a slitting part used for pushing the spacer to the slitting