The invention discloses a making method of ready-to-eat soup with pepper. Based on the formula of conventional soup with pepper, flour is used as a raw material, kelp, laver and a composite stabilizerare added, and the ready-to-eat soup with pepper is processed and made. The influence of the addition quantity of three kinds of stabilizing agents including xanthan gum, carrageenin and konjaku flour on the brewing stability of the soup with pepper is researched, based on single-factor experiment, the optimal compounding ratio of the stabilizing agents is researched through three-factor three-level orthogonal experiment, and the optimal technological condition is determined; and the soup with pepper, which is made under the optimal technological condition, is uniform in soup color, viscous in soup liquor and good in stability and mouth feel.