Clay-based composite material and preparation method thereof

The invention discloses a clay-based composite material. The clay-based composite material contains the following components in parts by weight: 5-99.99 parts of ultralight clay, 0.01-95 parts of conductive filler and 0-50 parts of lubricant; or 20-99 parts of ultralight clay, 1-80 parts of conductive filler, 0-30 parts of aqueous solution and 0-70 parts of lubricant. A preparation method of the clay-based composite material comprises the following steps: (1) naturally drying the ultralight clay mold or spraying or dipping or brushing conductive fillers and naturally drying for 8-96 hours; (2)putting the ultralight clay and the conductive fillers into a stirring machine with the water content of 30-75%, putting into a sealed container after sealed stirring, and when in use, taking out themold and naturally drying; the clay-based composite material is reduced by the following steps: crushing the naturally-dried clay-based composite material into particles, adding water, putting into the sealed container, placi