Liver cancer ablation needle positioning device

The invention relates to the technical field of medical instruments, in particular to a liver cancer ablation needle positioning device which comprises an operating table frame and further comprises a portal frame fixed to the operating table frame, a sliding block is slidably connected to a cross beam of the portal frame, an arc-shaped frame is arranged at the bottom of the sliding block, a needle feeding mechanism is arranged on the arc-shaped frame, and an ablation needle body is arranged on the needle feeding mechanism. The needle feeding mechanism is further provided with a storage barrel used for storing and protecting the ablation needle body, the storage barrel is communicated with the disinfection mechanism, the disinfection mechanism is arranged on the operating table frame, and the disinfection mechanism conveys disinfectant into the storage barrel through a pipeline so that the surface of the ablation needle body can be disinfected. A brush assembly used for cleaning the surface of the ablation ne