The invention discloses a double-row-ditching material distributor for earthworm composting. The double-row-ditching material distributor comprises a rack, two height-adjustable ditchers are mounted on the rack, two land wheels are mounted below the rack, a material box is arranged above the rack, first middle transition shafts and second middle transition shafts are arranged between the rack and the material box, two material conveyors are symmetrically mounted in the bottom of the material box, a first chain wheel is mounted on each material conveyor, the land wheels are connected through a power output shaft, a third chain wheel is mounted on the power output shaft and connected with a fourth chain wheel on the first middle transition shaft through a chain, a second chain wheel is mounted on each second middle transmission shaft and is correspondingly connected with the first chain wheel on each material conveyor through a chain, and the first middle transition shaft respectively transmits power to each second middle transition shafts through two clutches. The double-row-ditching material distributor can realize two functions of ditching and material distributing at the same time under traction of matched power.