The invention discloses a condensing catalytic device for treating high concentration organic waste gas and a treatment method using the same. The device comprises a condensing system, a gas concentration balance system and a catalytic oxidation system. The device couples the advantages of the condensing and catalytic oxidation technologies. Through frequency conversion interlocking of the highesttemperature point of a catalytic oxidation reactor to a gas concentration balance device, a gas distribution box and a dilution fan, operation stability and concentration linking safety under the condition of coupling of the two technologies are guaranteed. Through cold energy recovery of cold gas of a three-dimensional heat exchanger and heat recovery of hot gas of a gas-gas heat exchanger in the condensing system, the energy consumption of equipment operation is low. Through the overall skid-mounting of equipment, a floor space is small and on-site installation is convenient and quick.