Sewage treatment equipment for high and cold rural areas

The utility model relates to sewage treatment equipment for high and cold rural areas, which comprises a first anaerobic tank, a second anaerobic tank, a contact anaerobic biological membrane tank and a filter tank, and inner cavities of the first anaerobic tank, the second anaerobic tank, the contact anaerobic biological membrane tank and the filter tank respectively comprise a vacant cavity positioned at the upper part and a treatment cavity positioned at the lower part, a treatment cavity of the first anaerobic tank, a treatment cavity of the second anaerobic tank, a treatment cavity of the contact anaerobic biological membrane tank and a treatment cavity of the filter tank are communicated in sequence; the processing cavity is located below the frozen soil layer. During construction, the foundation pit is excavated to the position below a frozen soil layer, so that treatment cavities of the first anaerobic tank, the second anaerobic tank, the contact anaerobic biological membrane tank and the filter tank