We now present the results about the spin- and valley-dependent transport properties in CMSSs. First, we will discuss the physical properties for the case of symmetrical structures (S-CMSSs). Then, by inducing structural asymmetry, we will deal with the so-called asymmetrical structures (A-CMSSs) as well as asymmetrical magnetic silicene superlattices (A-MSSLs) in order to compare the spin-valley polarization and tunneling magnetoresistance of aperiodic and periodic structures.