The utility model discloses an electric wire length measurement drum, including the drum body, the axial both ends of drum body are provided with and are used for blocking the flange that the electric wire is deviate from, be provided with the scale on the flange. Drum surface girth is 1 meter. Drum body axle head portion sets up an electric wire top fixed orifices that is used for fixing electric wire top. The device only needs the number electric wire number of turns when the cable of measuring integer rice length, simple, accurate, can also measure the electric wire of non -integer rice length simultaneously, is suitable for individual, narrow space operation.