The invention discloses an electric internal clamp for a pipeline. The electric internal clamp for the pipeline comprises a rack, a motor, a driving device and butt working portions, wherein the butt working portions and the driving portion are respectively connected with the motor; a braking portion connected with the motor is also arranged. The internal clamp disclosed by the invention is divided into a front portion and a rear portion; mainly by means of three sets of identical coaxial line butt tensioning mechanisms driven by the motor, the center line of the internal clamp is superposed with that of the pipeline; the electric internal clamp for the pipeline is simple and reasonable in structure, low in duty ratio, convenient to adjust, small in inertia, reliable in braking, good in control system robustness and high in butt precision, and is capable of directly utilizing electric energy; compared with hydraulic and pneumatic internal clamps, the electric internal clamp for the pipeline has the advantages that the construction cost can be reduced, and the construction efficiency can be improved.