Abstract: A self-propelled all terrain track driven trench box carrier, comprising a main frame, a pair of side frame members, a pair of transversely adjustable end wall frame members and detachable attachable extension structure members. A cat-walk, hand rails, access ladders and safety rails. A pair of adjustable hydraulic wheel track assemblies mounted along the two sides, supporting the apparatus, and allowing the trench box carrier to be propelled along the ground. A pair of detachable attachable extension structure members, for adjusting the width of the trench box carrier, to accommodate different widths of a trench. Adjustable wheel track connectors are detachably attached with an extension axle, to increase the overall wheel base of a trench box carrier for work on oversize trenches. A plurality of hydraulic cable wenches for controlling a trench shield. A main engine power supply for operating a self-propelled all terrain trench box carrier.