NOVELTY - Production of chemical products from natural gas, coal, and petroleum comprises converting natural gas by performing partial oxidization reduction to generate crude synthesis gas containing carbon monoxide (CO), carbon dioxide (CO2), and hydrogen gas (H2), cooling the crude synthesis gas, and mixing with exchange gas; processing gasified coal slurry, petroleum coke, and an organic wastewater and methane; processing petroleum process oil, and carrying out catalytic cracking reaction; and synthesizing and purifying.    USE - Method for the production of chemical products (such as dimethyl ether, octanol, and methanol) from natural gas, coal, and petroleum (claimed).    ADVANTAGE - The method achieves high comprehensive utilization rate of raw materials, has little waste discharge, and achieves multiple terminal products.    DETAILED DESCRIPTION - Production of chemical products from natural gas, coal, and petroleum comprises:    (A) converting natural gas by performing partial oxidization reduction to oxygen from an air separating device (4) in a natural gas conversion system (1), where the natural gas has a volume ratio of 0.6-0.8 at 4.5-6.2 MPa and 1200-1350 degrees C to generate crude synthesis gas containing carbon monoxide (CO), carbon dioxide (CO2), and hydrogen gas (H2); cooling the crude synthesis gas in a cooling unit (2) by cooling water; mixing the crude synthesis gas with exchange gas from an exchange unit (6) in a purifying unit (5), processing to obtain purified synthesis gas, CO2, and sulfuric-acid containing gas, where a part of the CO2 is discharged or used as oil extraction power source, and the rest of the CO2 is conveyed to a synthesis gas distribution system (9), leading a sulfur-containing acid gas in a sulfuric acid gas desulfurization unit (3), and recovering the sulfur;    (B) processing gasified coal slurry from catalytic cracking unit (13), petroleum coke from a synthesis system (12), and an organic wastewater and methane from an olefin unit (15) in a pulping unit (11) to prepare 58-66 wt.% multi-element material, leading to the air separating device and in a gasification system (7) at 4.6-6.2 MPa and 1320-1400 degrees C under the condition of partial oxidation-reduction reaction to generate carbon monoxide (CO), H2, CO2, methane (CH4), and water, and sending the gas to a converting unit part;    (C) processing petroleum process oil in an oil processing system (14) to obtain gasoline, diesel oil, heavy oil, paraffin, and paraffin oil, carrying out catalytic cracking reaction in the catalytic cracking unit to obtain gasoline, diesel oil, liquefied gas, dry gas, and petroleum coke, where petroleum coke is returned to the pulping unit, cracking dry gas in a cracking gas compression unit (10) through a hydrogen separating unit (8) to obtain hydrogen and fuel gas, and sending the hydrogen synthesis gas to the gas distribution system, and using the fuel gas as fuel;    (D) synthesizing gas in the gas distribution system, and purifying in the purifying unit from the hydrogen separating unit; and    (E) synthesizing in the synthesis gas system to obtain dimethyl ether, octanol, and methanol, conveying the methanol to the methanol-olefin unit to prepare olefin; and returning the organic wastewater produced by the synthesis system together with the olefin-containing wastewater produced by the methanol-olefin unit to the pulping unit to prepare the pulp.    DESCRIPTION OF DRAWING(S) - The drawing is a block diagram of the production of chemical products.    Natural gas conversion system (1)    Cooling unit (2)    Sulfuric acid gas desulfurization unit (3)    Air separating device (4)    Purifying unit (5)    Exchange unit (6)    Gasification system (7)    Hydrogen separating unit (8)    Gas distribution system (9)    Cracking gas compression unit (10)    Pulping unit (11)    Synthesis gas system (12)    Catalytic cracking unit (13)    Oil processing system (14)    Olefin unit (15)