The invention relates to instant Korean big sauce soup and an eating method thereof, belonging to the technical field of preparation of big sauce soup. The instant Korean big sauce soup provided by the invention contains the following components in parts by weight: 5-10 parts of freeze drying powder of improved Korean big sauce soup powder, 2-3 parts of vegetable freeze-dried powder, 1-1.5 parts of chilli powder and 0.3-0.5 part of salt, wherein the fermentation raw materials of the improved Korean big sauce soup powder include wheat meal, and a strain for fermenting the wheat meal is aspergillus oryzae. The instant Korean big sauce soup provided by the invention can be eaten after being soaked with hot water, and is very convenient to carry and eat, rich in nutrients and beneficial to the popularization of the big sauce soup.