Accidents occur frequently in distribution network TV primary fuses blown, so it has a certain practical significance to study the main reason for the fuse blown and prevention measures. This article first introduces the causes of TV primary fuses blown are ferroresonance and low-frequency oscillation. Then it uses ATP-EMTP to establish the mathematical model of 10kV distribution system and based on the simulation analysis of three influence factors of TV primary fuses blown. Finally, it carries on the comprehensive comparison on the existing measures to prevent TV primary fuses blown.