The invention discloses a high-strength steel plate with excellent magnetic property. Parts of the chemical components of the steel plate comprise, by weight, 0.03-0.15% of C, less than or equal to 0.15% of Si, 1.00-1.80% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.08-0.18% of Ti, 0.03-0.07% of Nb and less than or equal to 0.010% of N, and the steel plate is characterized in that the left chemical components are, by weight, 0.05-0.10% of Als, 0.10%-0.20% of Re, 0.03%-0.07% of V , less than or equal to 0.005% of O and the balance of Fe and inevitable impurities. According to the high-strength steel plate with the excellent magnetic property, the high strength and the high magnetic-induction performance can be well matched, the yield strength is larger thanor equal to 750MPa, the tensile strength is larger than or equal to 800MPa, the elongation rate A is larger than or equal to 11%, the magnetic-induction performance B50 is larger than or equal to 1.70T, and the requirement of high-strength and high magnetic-induction performance steel for the rotor magnet yoke of a super-huge type hydro-generator with high single machine capacity can be met.