Abstract: The spin switching effect in RFeO3 system is classified and discussed in this paper. The spin switching effect refers to the henomenon that the rare earth (or iron) ions magnetic moments are reversed by 180° under a specific external field and temperature, which presents various forms due to the difference of rare earth ions. In this paper, the magnetic configurations of rare earth and iron sub-lattices, and the regulation of external magnetic field on spin switching are discussed in detail.