Fish pond filtration device

A fish pond filtration device, comprising a filter tank, a conical filter cylinder, a garbage collection trough, and a sewage pipe, wherein

• the conical filter cylinder, the garbage collection trough and the sewage pipe are located in the filter tank;
• water discharge ports are provided in a bottom or a side wall of the filter tank, and the conical filter cylinder is in rotary fit with the filter tank;
• a large-diameter end of the conical filter cylinder is open, the garbage collection trough is disposed below the large-diameter end of the conical filter cylinder, a filter port and a sewage discharge port are provided in a bottom of the garbage collection trough, and the sewage discharge port communicates into a sedimentation barrel;
• and
• a water pump is disposed at a first end of the sewage pipe, the water pump is located in a fish pond, a second end of the sewage pipe extends into the conical filter cylinder, and water outlets of the sewage pipe point to an inner wall of the conical filter cylinder.