The invention discloses radix paeoniae rubra particles and a traditional Chinese medicine preparation thereof. The radix paeoniae rubra particle preparation method comprises: taking radix paeoniae rubra decoction pieces, adding water and decocting 1-2 times, and carrying out heating decocting for 1-2 h, wherein 5-10 times of the water is added each time; combining the drug solutions, concentrating the filtrate to obtain an extract with a relative density of 1.02-1.10, and filtering with a 250-350 mesh sieve while hot; taking the extract, and carrying out spay drying to obtain dry powder; and carrying out dry granulation on the dry powder to obtain the radix paeoniae rubra particles with a particle size of 16-40 mesh. According to the present invention, the radix paeoniae rubra particle preparation method has advantages of simple process and easy process parameter control, and the detection method is scientific and fast, and has strong operability.