A method of preparing a wood chip-type organic composite fertilizer, the method comprising the steps of: a. preparing wood chips by chipping at least one region of an outer bark-stripped unsewn timber, a bough, and a root into chips having a diameter of 1 to 4 cm; b. preparing a liquid organic fertilizer by blending 73.0 to 80.0 wt% of an organic by-product, 6.1 to 9.0 wt% of a nutrient in which nitrogen, phosphorous and potassium are mixed at a weight ratio of 1:0.1 to 0.4:1.0 to 5.0, and 13.9 to 18.0 wt% of water; c. forming an organic mixed solution by mixing 75.0 to 85.6 wt% of the organic fertilizer of the step@ with 0.10 to 5.0 wt% of a water-dispersible binder and 14.3 to 20.0 wt% of a colorant; d. obtaining colored wood chips by simultaneously immersing the wood chips of the step a in the organic mixed solution of the step c and applying hot air to the organic mixed solution at a temperature of 120 to 200 °C for 30 to 40 seconds to coat the woods chips with colors; e. drying the wood chips to a high temperature to remove moisture formed on an outer surface of the wood chips of the step d and to make the organic mixed solution penetrate evenly into the wood chips at the same time; and f. packing the dried wood chips of the step e by weight unit with the measurement thereof on a scale, wherein drying of the wood chips in the step e comprises the steps of: sorting a good product and a defective product from the wood chips while transferring the wood chips through a conveyor, and primarily drying the wood chips by applying hot air toward a conveyor belt from an air blower or a heater at the same time; secondly drying the wood chips by transferring the primarily dried wood chips to a rotary dryer through the conveyor, and applying hot air to the wood chips within the rotary dryer; and transferring the secondly dried wood chips to a discharger through the conveyor to discharge the wood chips from the discharger, and applying hot air to the wood chips from the air blower or the heater to thirdly dry the wood chips at the same time. a. preparing wood chips by chipping at least one region of an outer bark-stripped unsewn timber, a bough, and a root into chips having a diameter of 1 to 4 cm; b. preparing a liquid organic fertilizer by blending 73.0 to 80.0 wt% of an organic by-product, 6.1 to 9.0 wt% of a nutrient in which nitrogen, phosphorous and potassium are mixed at a weight ratio of 1:0.1 to 0.4:1.0 to 5.0, and 13.9 to 18.0 wt% of water; c. forming an organic mixed solution by mixing 75.0 to 85.6 wt% of the organic fertilizer of the step@ with 0.10 to 5.0 wt% of a water-dispersible binder and 14.3 to 20.0 wt% of a colorant; d. obtaining colored wood chips by simultaneously immersing the wood chips of the step a in the organic mixed solution of the step c and applying hot air to the organic mixed solution at a temperature of 120 to 200 °C for 30 to 40 seconds to coat the woods chips with colors; e. drying the wood chips to a high temperature to remove moisture formed on an outer surface of the wood chips of the step d and to make the organic mixed solution penetrate evenly into the wood chips at the same time; and f. packing the dried wood chips of the step e by weight unit with the measurement thereof on a scale, wherein drying of the wood chips in the step e comprises the steps of: sorting a good product and a defective product from the wood chips while transferring the wood chips through a conveyor, and primarily drying the wood chips by applying hot air toward a conveyor belt from an air blower or a heater at the same time; secondly drying the wood chips by transferring the primarily dried wood chips to a rotary dryer through the conveyor, and applying hot air to the wood chips within the rotary dryer; and transferring the secondly dried wood chips to a discharger through the conveyor to discharge the wood chips from the discharger, and applying hot air to the wood chips from the air blower or the heater to thirdly dry the wood chips at the same time. sorting a good product and a defective product from the wood chips while transferring the wood chips through a conveyor, and primarily drying the wood chips by applying hot air toward a conveyor belt from an air blower or a heater at the same time; secondly drying the wood chips by transferring the primarily dried wood chips to a rotary dryer through the conveyor, and applying hot air to the wood chips within the rotary dryer; and transferring the secondly dried wood chips to a discharger through the conveyor to discharge the wood chips from the discharger, and applying hot air to the wood chips from the air blower or the heater to thirdly dry the wood chips at the same time.