The invention discloses an integrated effective silt and waste soil treatment device which is mainly suitable for treating mud and sand soil excavated out during urban construction. The device at least comprises a grinding part and a mud and sand separating part, wherein a grinding element on a roller inner wall of the grinding part preliminarily crushes to-be-treated mud and sand entering the grinding part, and transfers the crushed mud and sand into the mud and sand separating part; a high pressure dilution water nozzle is arranged on the outer side of the mud and sand separating part; the mud and sand entering the material separating part is diluted to be dilute mud and sand; the mud and sand separating part allows the dilute mud and sand mixture with particle sizes smaller than a predetermined big material particle size to pass through; a big material mixture with particle sizes greater than or equal to the predetermined big material particle size is discharged through a discharge gate. By the device disclosed by the invention, the to-be-treated mud and sand are treated to be the dilute mud and sand and the big material mixture by using the roller type mud and sand separating device; waste soil transported out by a soil truck for a construction site can be poured into the separating device directly, and the waste soil is treated into the dilute mud and sand and the big material mixture fast, so that accumulation is avoided.