The invention belongs to the technical field of electronic components and relates to a multi-layer chip filter and a preparation method thereof. The filter leads in ceramics and ferrite in the same chip and simultaneously realizes large inductance and large capacitance; wherein, the inductance consists of a hollow inductance (a 'magnetic core' is a ceramic material) and a magnetic core induction (the magnetic chip is ferrite material). The hollow inductance is characterized by small inductance value, large quality factor, high self-resonance frequency, and the like, thus being capable of better broadening the working frequency section of the filter; the magnetic core inductance has the characteristics of large inductance value, low self-resonance frequency, and the like, thus better reducing the in-band insertion loss of a filter with a low cut-off frequency and improving the effect of the transmission signal of the filter. The preparation method of the multi-layer chip filter includes the steps such as material preparing, casting, punching, pore filling, conductor printing, chip overlapping, isostatic pressing, gumming, sintering, etc. The filter has the advantages of small size, large rectangle degree, large out-band rejection as well as broad working frequency. The preparation method has high controllability and can be compatible with the technique of the existing chip components.