Electric heating pipe capable of accurately controlling temperature

The invention relates to an electric heating pipe capable of accurately controlling temperature. The electric heating pipe comprises an outer protecting pipe, a temperature controller, a heating wire, a conductive bar and a ceramic pipe, wherein the outer protecting pipe is filled with magnesia powder; the heating wire and the conductive bar are both arranged in the outer protecting pipe; the heating wire is connected with the conductive bar; the conductive bar passes through the ceramic pipe arranged at one end of the outer protecting pipe, and is fixed through nuts; the temperature controller is arranged in the outer protecting pipe, is connected with the heating wire, and comprises a main temperature controller body and a temperature controller shell. The electric heating pipe is capable of accurately controlling temperature, so that liquid is heated to a certain temperature; the constant temperature requirement is achieved; over-temperature protection on a medium is achieved when the electric heating pipe is applied to liquid heating.