Sewage collection device and sewage treatment system

The invention relates to the field of sewage collection devices and sewage treatment systems, concretely to a sewage collection device and a sewage treatment system. The sewage collection device includes a dredging structure, a drain hole, a debris cleaning structure, a storage structure, a depth adjustment structure and an angle adjustment structure. The debris cleaning structure is arranged on the depth adjustment structure. The debris cleaning structure is slidingly connected to the depth adjustment structure, which facilitates the adjustment of the depth of the debris cleaning structure into a sewage well so as to facilitate the layer-by-layer cleaning of sewage and debris in the sewage well, which facilitates the utilization of the device in sewage wells with different depth, thereby greatly improving the operation flexibility. The debris cleaning structure is fixed to the depth adjustment structure so as to facilitate the separation of the sewage and the debris to effectively prevent a silt pump from blockage and damage and facilitate the removal of the debris in sewage well out of the sewage well, thereby greatly improving the classification efficiency and quality of the sewage and the debris and further reducing the construction difficulty.