The invention discloses a nanometer filtering heating separator, which comprises a first reaction chamber, a second reaction chamber and a separator case, wherein the first reaction chamber is arranged in the separator case; a third reaction chamber is arranged at one side of the first reaction chamber; a first water inlet opening is formed in the top of the separator case; a first liquid discharging pipe and a second liquid discharging pipe are arranged at one side of the separator case; an operation and control table, an observation screen and a first heat radiator are arranged on the separator case; the first water inlet opening, the observation screen and the operation and control table are sequentially arranged from top to bottom; a power supply is arranged in the operation and control table; a first press button, a second press button, a third press button and a fourth press button are arranged on the operation and control table; a second water inlet opening is formed in the top of the second reaction chamber; a first guide pipe is arranged in the second reaction chamber; a first heater is arranged at one side of the first guide pipe; a fourth reaction chamber is arranged at one side of the second reaction chamber; a second guide pipe is arranged in the fourth reaction chamber. The nanometer filtering heating separator has the advantages that the design is novel; the functionality is relatively high; the nanometer filtering heating separator is suitable for mass popularization.