Multi-stage filtering structure for coal mine water prevention and control drainage pipeline

The invention relates to a multistage filtering structure for a coal mine water prevention and control drainage pipeline, and discloses a multistage filtering structure for a coal mine water prevention and control drainage pipeline. A front filter screen is matched with a side filter screen and an upper filter screen to perform multistage filtering on insoluble garbage in shunted mine water, and then a settling tank arranged outside the drainage pipeline is used for collecting and settling the filtered garbage; a multi-stage filtering structure convenient for cleaning personnel to clean comprises a drainage pipeline, a circular fixing sleeve arranged in the drainage pipeline, a square filtering cylinder arranged in the circular fixing sleeve, a multi-stage filtering assembly arranged on the square filtering cylinder, a pollution discharge assembly communicated with the multi-stage filtering assembly and a settling tank communicated with the pollution discharge assembly, the mine water filtering device is char