Twenty expressions describing the overall standard deviation(σ) of thermal safety criteria of small-scale energetic materials were presented. The values of σ and relative standard deviation of thermal safety criteria for 1, 1′-dimethyl-5, 5′-azotelrazol monohydrote, 3-nitro-1, 2, 4-triazol-5-one, bis(2,2,2-trinitroethyl) formal and double-base propellant composed (56±1) wt% of NC, (27±0.5) wt% of NG, (8.5±0.15) wt% of DNT, (2.5±0.1) wt% of methyl centralite, (5.0±0.15) wt% of catalyts and (1.0±0.1) wt% of other were reported.