Among the topological Dirac semimetals (TDSs) materials, Cd3As2 has been treated as an ideal because its ultrahigh mobility and chemical stability in air make it rich in potential for finding new topological phases [1-4]. Compared to other 3D TDSs exhibits higher carrier mobility (9 x 106 cm2 V-1 s-1 at 5 K) [5]. We have attempted to carry out a study of single crystals of the quaternary solid solution (Cd1-x-yZnxMny)3As2 (CZMA) (х+y = 0.4) were у = 0.08.  A modified Bridgeman method was used to obtain single crystals of CZMA. All investigated samples (Cd1-x-yZnxMny)3As2 had tetragonal, space group P42/nmc. Well-resolved single-period SdH oscillations well observed in the all investigated CZMA (х+y = 0.4) specimens at temperatures between T = 4.2 and 50 K. Recently, it was found that for a single crystal CZMA (y = 0.08) cyclotron mass is independent of magnetic field, B, and at a manganese concentration of y = 0.04 in the samples CZMA [6] were observed anomalous dependence of the cyclotron mass of the magnetic field, that obeys a linear law B m Bm C C.  The concentration of charge carriers in a surface 2D-layer can be found from SdH oscillations through Lifshitz-Onsager relation [7], where = 1.9×1012 cm–2, where e – elementary charge of an electron; h – Planck constant. The wave vector can be determined if the density of charge carriers is known. From the data of experimentally obtained values [8 - 10] and the values we obtained for CZMA (y = 0.08) for dependence cyclotron mass mс(0)/m0 from Fermi wave vector kF, are in a good accordance with theoretical linear dependence, that describe mass-less Dirac fermions.