Objective: Taking ultrafine granular powder of Salviae Miltiorrhizae Radix et Rhizoma(UGPSMR)as the research object,to establish a method for evaluating its phys. properties.Method: A method was established for measuring the particle size distribution and sp. surface area of UGPSMR,and the methodol. investigation was carried out.A total of 15 phys. indicators[D90(particle size value when the cumulative particle distribution reaches 90%),particle size distribution range,particle size distribution width,bulk d.,tap d.,intergranular porosity,Carr index,sp. surface area,pore volume,angle of repose,tablet angle,Hausner ratio,black to white degree L∼*,red to green degree a∼*,yellow to blue degree b∼*]were used to characterize the quality attributes of UGPSMR and to construct the phys. fingerprint.Multivariate statistical anal. methods such as similarity anal.,cluster anal.(CA),principal component anal.(PCA)and orthogonal partial least squares discriminant anal.(OPLS-DA)were used to evaluate the quality of 11 batches of UGPSMR(S1-S11)produced in different years,and to find out the difference index between samples from different batches.Result: The method for measuring the particle size distribution and sp. surface area of UGPSMR was feasible and repeatable.The similarities between the phys. fingerprint of 10 batches of samples(S1-S3,S5-S11)from production and control fingerprint of UGPSMR were above 0.85,but the similarity between sample S4 and the control fingerprint was only 0.488.There were some differences in phys. property indicators between different batches of UGPSMR, and the characteristic difference indicators were intergranular porosity,sp. surface area,pore volume,b∼*,L∼*,Carr index,particle size distribution width, resp.Conclusion: This method can comprehensively evaluate the phys. quality attributes of UGPSMR, and can reflect the effect of differences in material basis of the medicinal materials or production process on the phys. properties of finished products,and can evaluate quality consistency between batches from the phys. state level,which provides new ideas for the quality control of ultrafine granular powder of herbal medicine.