The invention discloses a plant waste integrated utilization method. The method comprises 1, classifying plant wastes, removing impurities, and carrying out cutting until the plant waste length is less than the hearth diameter, 2, drying the plant wastes to control water content less than 25%, 3, burning the plant waste in a carbonization furnace, 4, through adjustment of an exhaust air rate, controlling a furnace inner temperature in a range of 200-400 DEG C, a carbonization furnace outlet smoke temperature in a range of 80-150 DEG C and a condenser outlet smoke temperature in a range of 15-30 DEG C, 5, cooling a temperature in a plant vinegar liquid recover to 15-30 DEG C by a condenser, wherein a carbonization furnace primary smoke vent is communicated with the plant vinegar liquid recover, 6, recovering and treating the plant vinegar liquid, 7, recovering tar, 8, discharging the completely carbonized plant wastes in the carbonization furnace and carrying out cooling, and 9, recovering and treating plant-charcoal.