Objective To investigate coagulation disorder and its correlation with serum globulin in different types of patients with primary myeloma (MM). Methods Totally 80 patients with MM (24 cases of light chain type, 36 cases of IgG type, 20 cases of IgA type) and 38 cases of healthy subjects were involved in this study. The blood coagulation indexes and serum globulin levels were measured. Correlation between the indexes of coagulation and serum globulin was determined. Results PT and APTT were upregulated significantly in group IgA and group IgG compared with light chain group and control group (P < 0.05). No significant difference in FIB and TT were identified among all groups (P > 0.05). Patients in Light chain group experienced increased levels of D-dimer compared with IgA and IgG group (P < 0.05). upregulated levels of serum globulin were founded in IgA group and IgG group when compared with light chain group (P < 0.05). Serum levels of globulin were positively correlated with PT and APTT (r = 0.713 and 0.613, respectively) while obvious relationship was suggested between serum globin and D-dimer. Conclusion MM patients with IgA type and IgG type MM are more likely to exert the coagulation dysfunction while patients with light chain type prompt to thrombosis; serum globulin is positively associated with PT and APTT levels.