The invention relates to a multi-level equalizing resonance zero current soft switch DC-DC converter. The DC-DC converter is composed of a direct current equalizing capacitor group and two-port DC-DC resonance soft switch conversion units connected with capacitors in the direct current equalizing capacitor group. For the converter with a level number of (m+1) (m is an integer and is more than or equal to 2, similarly hereinafter), the direct current equalizing capacitor group is composed of m direct current equalizing capacitors (Cm, C,..., C2, C1) in series connection from top to bottom in order, and the potentials of the capacitors (Cm, C,..., C2, C1) in the direct current equalizing capacitor group decrease from top to bottom in order. The capacitors in the direct current equalizing capacitor group are connected with at least (m-1) two-port DC-DC resonance soft switch conversion units. The DC-DC converter achieves capacitance and voltage self-balancing, all the switch tubes and diodes achieve zero current switching, the two-port DC-DC resonance soft switch conversion units work without affecting each other and independently mutually, and the whole converter system has characteristics of structure modularization and simple control mode.