The invention discloses a coal blending coking system using high-sulfur coal and a coal blending method of the coal blending coking system and solves the problem that a large amount of carbon dioxide is generated when the high-sulfur coal is used for coal blending coking. The coal blending coking system comprises a coal blending conveying belt (5) and a coking oven (14), wherein an auxiliary quantitative feeding bin (4) and a sulfur-fixing agent quantitative feeder (9) are respectively arranged on the coal blending conveying belt (5). The coal blending method includes: by the total coal blending amount of 100 parts, placing 25 parts of high-sulfur fat coal, 25 parts of high-sulfur coking coal and 50 parts of long-flame coal on the coal blending conveying belt (5), placing 10 parts of calcium hydroxide sulfur-fixing agent and 1 part of aluminum oxide auxiliary on the coal blending conveying belt (5), and performing coal blending. The coke produced by the coal blending coking can be widely applied to civil heating and civil boilers.