NOVELTY - Separation and condensation of biomass cracking gas comprises cracking biomass; removing more than 90% of dust; contacting the cracking gas with water flow; fast condensing the cracking gas; separating the condensed cracking gas into gas phase product and liquid phase product; condensing the gas phase product; refluxing condensed water to a liquid phase product storing pot; introducing combustible gas into a gas cabinet; conveying 1 part of liquid phase product into a chilling condenser; and introducing the rest of the liquid into a fractionating device.    USE - Separation and condensation of biomass cracking gas (claimed).    ADVANTAGE - The method solves the problems of dust-removing and tar in the cracking process. It is simple and can save energy.    DETAILED DESCRIPTION - Separation and condensation of biomass cracking gas comprises:    (A) cracking biomass by a cracking furnace to generate cracking gas with temperature of more than 300 degrees C;    (B) removing more than 90% of dust by depositing and inertial dust collection device;    (C) introducing the cracking gas into a water flow chilling device, where cracking gas is contacted with water flow with temperature of more than 90-100 degrees C;    (D) fast condensing the cracking gas to 90-100 degrees C;    (E) separating the condensed cracking gas into gas phase product and liquid phase product, where gas phase product comprises water steam and combustible gas, and liquid phase product is a mixture of tar and pyroligneous liquor;    (F) condensing the gas phase product by a condenser to remove a large part of water; refluxing condensed water to a liquid phase product storing pot; and introducing combustible gas into a gas cabinet for storing;    (G) collecting the liquid phase product having a temperature of 90-100 degrees C, in the storing pot;    (H) conveying 1 part of the liquid into a chilling condenser through a circulating pump for condensing high-temperature cracking gas;    (I) introducing the rest of the liquid into a fractionating device; and    (J) separating the tar and pyroligneous liquor and conveying to respective storing pot for storing.