The invention provides a method for reusing a sintered reclaimed NdFeB material. According to the method for reusing the sintered reclaimed NdFeB material, the sintered reclaimed NdFeB material becomes a powder material with a certain granularity after breaking, hydrogen decrepitation, sieving, mixing and crushing through an air stream mill are conducted, a Pr-Nd or Nd rare earth nanometer additive is added to the sieved powder material through a jet-propelled method in an argon atmosphere, and then the sieved powder material and the additive are evenly mixed; magnetic field orientation forming, isostatic pressing and sintering are conducted on the sampled powder material, so that a sintered sample is formed, then performance detection is conducted on the sintered sample, according to a sample detection result and the performance requirement, 0-60 wt% of powder of a relevant grade is added, even mixing is conducted, and after magnetic field orientation forming, isostatic pressing and sintering are conducted on the mixture, a NdFeB finished product is formed. According to the method for reusing the sintered reclaimed NdFeB material, roasting and remelting are not needed, it is only required that rare earth nanometer powder is directly added to reclaimed powder and evenly mixed with the reclaimed powder, and then the product can be prepared according to a conventional technology; in this way, the technology process is simple, task time is shortened, energy consumption is reduced, the amount of used rare earth is reduced by 50% relatively, and the coercivity is increased by 15%-20% relatively; due to the effect of the rare earth nanometer additive, liquid phase mobility is improved during sintering, magnet consistency is improved, the sintering temperature is lowered, and sintering time is shortened.