Magnetic induction component capable of being automatically manufactured and rapidly assembled and reducing adverse effect to transformer by leakage inductance

Disclosed is a magnetic induction component including a magnetic core, a primary winding, a secondary winding, and a base. In which, the base has a main body. The main body is provided with a hollow portion that is axially penetrated, and is formed with n x outwardly protruded slots on the surface, wherein n is greater than or equal to 1, so as to divide the main body into n+1 x winding regions provided for selectively winding by the primary winding. The slot is provided with a compartment, a through hole communicated with the hollow portion, and an opening allowing the secondary winding entering the compartment therein. Thus, the magnetic core is penetrated through the hollow portion, the through hole and the loop of a conductive sheet to be able to be inductive and magnetically conductive by the primay winding and the secondary winding.