Coupling inductance is a key factor in inductive storage pulse power supply. Starting from STRETCH Meat grinder circuits, the concept of high coupling inductance is described first in this paper, then high coupling energy storage inductance models are given by analyzing key factors influencing coupling degree, and mathematical derivation is carried out for inductance value and magnetic field calculation of coupling inductance. In order to further understand magnetic field distribution of coupling inductance, finite element simulation is performed against it, and magnetic induction intensity distribution map and energy distribution map of coupling inductance are obtained. In consideration of flux leakage, simulating calculation is conducted for flux leakage of coupling inductance in the end part of this paper. Research work in this paper provides certain theoretical basis for optimization design of the high coupling storage inductance used for pulse power supply.