Repair device and method of ceramic electric melting furnace and radioactive waste liquid treatment system

The invention discloses a repairing device and method for a ceramic electric melting furnace and a radioactive waste liquid treatment system comprising the repairing device, a discharging mechanism is arranged at the bottom of the ceramic electric melting furnace, the repairing device is arranged in the discharging mechanism and comprises a bottom plate, a continuous pipe and a thermal compensation mechanism, the bottom plate is arranged at a bottom discharging port of the discharging mechanism, and the continuous pipe is arranged on the bottom discharging port of the discharging mechanism. The bottom plate is provided with a first through hole corresponding to the bottom discharging port, one end of the continuous pipe is used for being connected with a residual discharging pipe in the ceramic electric melting furnace, the other end of the continuous pipe is aligned to the bottom discharging port, the thermal compensation mechanism comprises a spring, the two ends of the spring are connected with the bottom