The invention discloses a special wire measurement device for meter case wiring, comprising a wire measurement device and a wire sectioning device; the wire measurement device comprises three telescopic rods which are in one-to-end rotation connection; the wire sectioning device comprises a base plate, a sliding ruler plate I and a sliding ruler plat II; the sliding ruler plate II comprises a long longitudinal plate and a short transverse plate; the middle part of the bottom plate is horizontally provided with a sliding groove; the sliding ruler plate I is vertically arranged on the lower side of the sliding groove; the sliding ruler plate II is arranged on the upper side of the sliding groove; the long vertical plate of the sliding ruler plate II and the sliding ruler plate I are perpendicular to the groove; the bottom part of the upper end of the sliding ruler plate I and the bottom part of the short transverse plate of the sliding ruler plate II are provided with sliding blocks; and fastening bolts are sleeved on the sliding blocks. The invention is easy in usage, easy to measure the length of the lead for the meter case wiring and the straight angle bending position, convenient to cut out the lead having the identical length, and high in working efficiency, and avoids the waste of the lead.