Abstract: A trench blade having a unitary interchangeable leading edge, providing for the rapid replacement during usage. The blade is comprised of a steel body for attachment to a trench digging apparatus, wherein a replaceable hardened-steel front edge is mounted, allowing for the replacement thereof when the edge become worn or broken during over time. The edge is attached to the blade in a manner which allows the user to remove and replace the edge quickly and easily within a short period of time without removing the entire blade assembly from the trenching apparatus, thereby eliminating down time of the machine and improving job efficiency.