The invention provides an easy care treatment original bamboo fabric and a preparation method thereof. The easy care treatment original bamboo fabric sequentially comprises original bamboo fiber base cloth, a citric acid modification layer, a fibroin modification layer and a chitosan oligosaccharide modification layer. The concrete preparation method comprises the following steps of performing desizing treatment on the original bamboo fabric; performing low-temperature plasma activation treatment; soaking the fabric into modified solution containing citric acid; taking out the fabric; performing pre-baking to obtain a primarily treated original bamboo fabric; putting the primarily treated original bamboo fabric into a low-temperature plasma instrument; performing activating treatment; taking out the fabric; coating cellulose solution on the surface of the fabric; performing constant temperature still standing; soaking the fabric into a fibroin modification solution; performing twice dipping and twice rolling to obtain secondarily treated original bamboo fabric; coating a layer of chitosan oligosaccharide solution onto the secondarily treated original bamboo fabric; performing drying, water washing and drying shaping to obtain the easy care treatment original bamboo fabric.