The utility model discloses an ecological irrigation canals and ditches system processs the canal, including the canal main part, the canal main part has the slope that enables the rainwater and can flow to the canal low reaches from the canal upper reaches, characterized by: the canal main part is by wetland dam enclose, and the wetland dam includes upper reaches dam body, low reaches dam body and side dam body, establishes the constructed wetland that can purify the rainwater in the canal main part, and dam body bottom in the upper reaches is provided with the water inlet, is provided with the delivery port on the dam body of low reaches, and water inlet and delivery port height flush, make the trapezoidal aqueous stratum of canal main part formation one, be provided with matrix among the constructed wetland, matrix is including pyrite stone, zeolite, volcanic rock and clam shell, the nylon bag is arranged in to matrix, is equipped with the clearance between the adjacent nylon bag. The utility model has the advantages of the rainwater can be effectively purified, microorganism jam processing canal runner can be effectively prevented.