Self-adaptive sewage purification device

The invention discloses a self-adaptive sewage purification device, and relates to the technical field of environmental protection equipment, and the self-adaptive sewage purification device is characterized by comprising a treatment tank, a filter pipe assembly is arranged in the treatment tank, and the filter pipe assembly comprises a plurality of filter pipes, two water collecting pipes and a support for supporting; the two water collecting pipes are respectively positioned at the upper and lower ends of the filter pipe and are used for discharging water filtered by the filter pipe; the water collecting pipe is connected with a pumping device and a flushing device; the filter pipe comprises an inner filter pipe and an outer filter pipe, the upper end and the lower end of the inner filter pipe are connected with the water collecting pipes on the two sides respectively, the outer filter pipe is connected to the periphery of the inner filter pipe in a sleeving mode, and an annular cavity is formed between the