Sewage draining ditch with precast concrete block ecological revetment

The invention discloses a sewage draining ditch with a precast concrete block ecological revetment. The sewage draining ditch comprises a foundation (1) at the bottom and side slopes (2) located on the left side and the right side of the foundation (1), wherein a pebble bedding layer (1.1), a concrete bedding layer (1.2) and a broken stone bedding layer (1.3) are laid on the foundation (1) from top to bottom; on the side slopes (2), a plurality of precast concrete blocks (1.4) are longitudinally stacked in a misplaced manner and three rows of a plurality of precast concrete blocks (1.4) are transversely stacked; a hydrophyte system (1.6) is mounted in each precast concrete block (1.4); and each precast concrete block (1.4) is filled with aggregated rock, sandy soil and planting soil (1.5).The shortcoming in the prior art that a conventional sewerage system has a main function of merely meeting a pollution discharge demand in the aspects of sewage quantity, pollution discharge speed and the like is overcome. T