Abstract: The stray capacitance in multi-break vacuum circuit breakers can easily leads to uneven voltage distribution at each break,which seriously affects the breaking characteristics of multi-break circuit breakers.In order to study the relationship between the parameters of the distributed capacitance and the voltage distribution of the fracture,a simulation model was established to analyze the influence of the type of the distributed capacitance on the voltage distribution of the fracture.The results show that the equivalent selfcapacitance of the arc extinguishing chamber makes the fracture voltage distribution uniform,the stray capacitance to the ground makes the fracture voltage very uneven,and the stray capacitance of the structure makes the fracture voltage slightly uneven.Meanwhile,the influence of one type of distributed capacitance on the fracture voltage unevenness coefficient is analyzed in the case of multiple distributed capacitance combinations.The results show that the existence of structural stray capacitance and ground stray capacitance can inhibit the damage of the other type of distributed capacitance to the fracture voltage uniformity.In addition,with the increase of the included angle of V-shaped arrangement,the partial pressure of the three fractures becomes more uneven.