Based on great clinical experience (more 1000 patients) the author makes attempt to standardize classification of peritonitis. Bearing in mind the critical analysis of available peritonitis classifications, it is proposed to divide toxic phase of peritonitis (by K.S. Simonyan) into two variants--with poliorganic insufficiency or without it. This elaboration permits to make the treatment of the patients with general peritonitis more detailed. Besides, the changes were made in division of peritonitis by degree of generalization along peritoneum, it is proposed to distinguish only 4 types by abdominal exudate character that also determine the actions of surgeon. Individual surgical situations in various forms and types of peritonitis are analyzed. The own model of peritonitis classification permits to receive comparable immediate results of treatment.