The invention discloses a method for expanding the response frequency range of a magnetoelectric sensor, which comprises the steps of firstly, acquiring amplitude-frequency data according to output signals of the magnetoelectric sensor under excitation of alternating magnetic fields which are different in frequency and identical in amplitude, and acquiring compensation coefficients at different frequencies according to a magnetoelectric coefficient at a resonant frequency and magnetoelectric coefficients at the different frequencies; acquiring response frequency domain data of a tested signal according to output signals of the magnetoelectric sensor under excitation of the tested signal; then multiplying the response frequency domain data of the tested signal and the compensation coefficients at the different frequencies to acquire compensated response frequency domain data of the tested signal; and finally, performing inverse Fourier transform on the compensated response frequency domain data of the tested signal so acquire compensated time domain data of the tested signal. Compensation for the output signals of the magnetoelectric sensor is realized from the aspect of a method, the method is simple to implement and low in cost, the method can be quickly adjusted so as to be applicable to different types of magnetoelectric sensors, and the development cycle of products can be shortened.