The invention relates to a semi-physical high-speed simulation method based on the smooth switching of a state. The method comprises the following steps: S1: according to a purpose of simulation verification, selecting a physical quantity to be revised; S2: judging whether the physical quantity to be revised is a dynamics integration variable or not, if the physical quantity to be revised is the dynamics integration variable, executing S4, and otherwise, executing S3; S3: converting the physical quantity to be revised into a corresponding dynamics integration variable; and S4: through switching control in a certain time range, revising the dynamics integration variable to finish the smooth switching of the state in a semi-physical simulation process. By use of the semi-physical high-speed simulation method, in a semi-physical simulation switching process, real-time/ super real-time seamless connection is realized, dynamics continuity is guaranteed, and two states before and after switching are in smooth transition.