NOVELTY - A co-producing apparatus for preparing charcoal, gas and oil with various biomass materials, comprises a carbonizing kiln, a draught fan, a purifying and recovering device, and a tail gas processor; where the carbonizing kiln uses pool structure and bottom of the pool carbonizing kiln is set with an air flue; the air flue is connected on suction opening on sidewall of bottom of the carbonizing kiln; and the suction opening is connected with a filtering and purifying pool independently arranged at outside of the carbonizing kiln and used for filtering larger particles.    USE - The co-producing apparatus is useful for preparing charcoal, gas and oil with various biomass materials (claimed).    ADVANTAGE - The co-producing apparatus can mix various materials to burn and carbonize, which changes situation of singly using biomass materials and enlarges using range of the biomass materials. Moreover, the method shortens production period, improves yield and quality, and obtains other industrial materials.    DETAILED DESCRIPTION - A co-producing apparatus for preparing charcoal, gas and oil with various biomass materials, comprises a carbonizing kiln, a draught fan, a purifying and recovering device, and a tail gas processor; where the carbonizing kiln uses pool structure and bottom of the pool carbonizing kiln is set with an air flue; the air flue is connected on suction opening on sidewall of bottom of the carbonizing kiln; the suction opening is connected with a filtering and purifying pool independently arranged at outside of the carbonizing kiln and used for filtering larger particles; the filtering and purifying materials are filled in the filtering and purifying pool; the filtering and purifying pool is connected with the purifying and recovering device; the gas outlet of the purifying and recovering device is connected with the draught fan by pipeline; the air outlet of the draught fan is connected with the gas phase separator; the gas phase separator is connected with the tail gas processor; and the gas phase separator is mounted with an non-explosive device on upper part. An INDEPENDENT CLAIM is a method for preparing charcoal, gas and oil with various biomass materials by using the co-producing apparatus, comprising: (a) collecting and processing materials: classifying the collected biomass materials based on sizes and sending to a storehouse, and roughly processing the biomass materials having greater volumes; (b) sending to a kiln: placing the processed biomass materials to a carbonizing kiln; where the biomass material is single material or mixed material; when sending the biomass materials to kiln, ensuring smooth upper surface of the materials to avoid material vacancy, and filling the carbonizing kiln fully with the biomass materials; (c) processing surfaces of the biomass materials in the carbonizing kiln: covering a layer of crushed materials on the biomass materials having smooth surface in the carbonizing kiln, controlling thickness of the crushed material based on thickness of the biomass materials, and controlling it at 2-5 cm; (d) igniting: using upper igniting method and uniformly igniting on upper surfaces of the carbonizing kiln; (e) starting the draught fan: guaranteeing that biomass materials to carbonize in the carbonizing kiln by controlling oxygen supplying amount in the carbonizing kiln, and generating smoke; controlling oxygen content by controlling starting and stopping time length of the draught fan, starting the draught fan for 30 minutes, then stopping it for 30 minutes, adding biomass materials while carbonizing, and repeating the steps for 8-10 hours; (f) purifying and recovering: controlling flowing speed of the smoke by controlling the draught fan, such that smoke containing dust, water and oil enters the purifying and recovering device through the air flue with a speed of 15-25 m/second; where the purifying and recovering device comprises a water bath purifier, a decoker, a condensation separator, a condensation circulating water pool, a wood acid recovering pool, and a wood oil recovering pool; and the circular water of the water bath purifier is from the wood acid recovering pool; filling clean water in the wood acid recovering pool, purifying it through water bath, washing the smoke with water, such that part of the wood acid is brought away by the circular water to form wood acid solution; connecting the decoker with the wood oil recovering pool, and mixing the wood oil with the water and precipitating them at bottom of the wood oil recovering pool, and cleaning and collecting at fixed time; (g) processing tail gas: directly igniting the tail gas processor or recovering with a tail gas purifying and recovering device; (h) alternately carbonizing for 8-10 hours, finishing carbonizing course of the biomass materials in the carbonizing kiln, uniformly spraying clean water on surfaces of the materials, and putting out the fire to get charcoal; and (i) collecting and processing the carbonized biomass charcoal, wood tar and wood acid solution.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the co-producing apparatus for preparing charcoal, gas and oil with various biomass materials.