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In this paper, we use a method to determine some basic parameters for the (r)-ray loud blazars. The parameters include the central black mass (M), the boosting factor (δ), the propagation angle (φ), the distance along the axis to the site of the (r)-ray production (d). A sample including 32 (r)-ray loud blazars with available variability time scaleshas been used to discuss the above properties. In this method, the (r)-ray energy, the emission size and the property of the accretion disc determine the absorption effect. If we take the intrinsic(γ)-ray luminosity to be λ Times the Eddington luminosity, I.e. Lin(r) =λLedd, then we have the following results: the mass of the black hole is in the range of (0.59 - 67.99) ⊙ (λ= 1.0) or (0.90 - 104.13) ⊙ (λ = 0.1); the boosting factor (δ) in the range of 0.16 - 2.09(λ=1.0) or 0.24 - 2.86 (λ=0.1); the angle (φ) in the range of 9.53 (λ =1.0) or 7.36°=0.1); and the distance (d/Rg) in the range of 22.39 - 609.36 (λ= 1.0) or 17.54 - 541.88 (λ = 0.1).