Filtering device and drainage and mining system

The invention discloses a filtering device and a drainage and mining system, and relates to the field of filtering equipment. The filtering device comprises a first filtering assembly (01), a power liquid tank and a connecting pipe assembly (02), wherein the first filtering assembly (01) is communicated with the power liquid tank through the connecting pipe assembly (02). Liquid in a well is firstly filtered by a first filtering unit (011a) and a second filtering unit (012a) in the first filtering assembly (01) and then is conveyed into the power liquid tank through a connecting pipe assembly (03). Due to the fact that the first filtering unit (011a) and the second filtering unit (012a) are not prone to being blocked, a rodless pump (10) can work continuously and stably, and the drainage and mining efficiency of the rodless pump (10) to a coal seam production well is effectively improved. 本申请公开了一种过滤装置及排采系统，涉及过滤设备领域。该过滤装置包括：第一过滤组件(01)、动力液箱和连接管组件(02)，第一过滤组件(01)和动力液箱通过该连接管组件(02)连通。井内的液体先通过第一过滤组件(01)中的第一过滤单元(011a