The invention relates to a solid insulation cabinet operating mechanism comprising an integral assembling board, a breaker module, a three-gang module, and a five-prevention interlocking mechanism. The breaker module comprises a breaker front assembling board, a breaker rear assembling board, a breaker operating shaft, a breaker main shaft, a switch-on energy-storing mechanism, an switch-off energy-storing mechanism, and a switch-on and switch-off operating mechanism. The three-gang module comprises a three-gang module assembling board, an isolation operating mechanism, and a grounding operating mechanism. The five-prevention interlocking mechanism comprises a three-gang module operating plate, an operating hole baffle plate, a first interlocking mechanism used for interlocking the operating hole baffle plate and the breaker main shaft, a second interlocking mechanism used for interlocking the operating hole baffle plate and a breaker switch-on switch, a third interlocking mechanism used for interlocking the isolation operating mechanism of the three-gang module and the grounding operating mechanism of the three-gang module, a fourth interlocking mechanism used for interlocking the three-gang module and the lower door of a solid insulation cabinet, and a fifth interlocking mechanism. The breaker module is arranged over the three-gang module in a split manner.