NOVELTY - An oil absorbing and separating catalytic dry gas (1) refinery contains absorption tower (8) and desorption tower (10), in which lower part of absorption tower is connected to catalytic dry gas inlet pipeline which contains compressor (7) and cooler, absorption tower is connected to bottom part of desorption tower, desorption tower is connected to upper part of absorption tower, tower top after absorption tower exit is connected to gasoline absorption tower (9), and lower and top parts of four carbon gas absorption tower and desorption tower are respectively connected to outside.    USE - An oil absorbing and separating catalytic dry gas refinery (claimed).    ADVANTAGE - Oil absorbing and separating catalytic dry gas refinery is simple to operate, reduces energy consumption and recovers catalytic dry gas, has low cost, and does not need ethylene or propylene refrigeration compressor.    DETAILED DESCRIPTION - An oil absorbing and separating catalytic dry gas (1) refinery contains four carbon absorption tower (8) and four carbon desorption tower (10), in which lower part of four carbon absorption tower is connected to catalytic dry gas inlet pipeline, catalytic dry gas inlet pipeline is provided with compressor (7) and cooler, four carbon absorption tower is connected to bottom part of four carbon desorption tower, four carbon desorption tower is connected to upper part of four carbon absorption tower, four carbon desorption tower is connected to outside, four carbon tower top after four carbon absorption tower exit is connected to gasoline absorption tower (9), and lower and top parts of gas absorption tower are respectively connected to outside. An INDEPENDENT CLAIM is included for absorption and separation method of oil absorbing and separating catalytic dry gas (1) refinery which involves compressing catalytic dry gas to absorbent carbon, cooling by four carbon tower kettle, subjecting four carbon material to desorption tower, circulating four carbon material to returning tower by compression, cooling, and absorbing four carbon tower top gas into gasoline absorbent (3).    DESCRIPTION OF DRAWING(S) - The drawing shows a process flow diagram of oil absorbing and separating catalytic dry gas.    Catalytic dry gas (1)    Gasoline absorbent (3)    Compressor (7)    Four carbon absorption tower (8)    Gasoline absorption tower (9)    Four carbon desorption tower (10)