The invention relates to a metal barrel particle-planting machine of a comb handle. The metal barrel particle-planting machine comprises an operation platform, a flocking particle bearing plate, a barrel rotating mechanism and a flocking particle transferring mechanism. When the metal barrel particle-planting machine is in use, flocking particles are placed in a containing groove of the flocking particle bearing plate in advance, the flocking particle transferring mechanism moves downward, an object fetching needle inserts a row of flocking particles on the flocking particle bearing plate and moves upward, the flocking particle transferring mechanism moves downward again, the flocking particles on the object fetching needle are correspondingly inserted into a row of through holes of a barrel, a second cylinder drives a connecting plate to drive the object fetching needle to move upward, a first cylinder does not run at the same time, and a pressing plate presses the flocking particles on the object fetching needle into the through holes of the barrel to complete particle planting of one row. Compared with the prior art, the metal barrel particle-planting machine has the advantages that the particle-planting machine is convenient to use, so that particle planting efficiency is improved; the above process is completed under control of a control program, so that influence of artificial factors is reduced, missed planting is avoided, and product quality stability is improved effectively.