The invention belongs to the technical field of amino acid production, and discloses a technology for preparing BCAA particles. The technology includes the following steps of 1) preparing ingredients;2) preparing compound amino acid; 3) mixing and pelleting; 4) discharging; 5) drying. According to the technology for preparing the BCAA particles, the BCAA particles are prepared with the wet-mixingpelleting technology, the particle size is controllable, particles are even, and the BCAA particles can be rapidly dissolved after the ingredients with the low additive amount are added.