A computer simulator (CS) of the physiological mechanisms of long-term control of the state of human cardiovascular system (CVS) is developed. The bases of CS are quantitative mathematical models (MM) describing: a) the effects of the central renin-angiotensin system on the characteristics of the CVS; b) the dynamics of the total blood volume. Test studies of MM in offline mode showed the adequacy of the models. It is planned to combine this model with the previously created model simulating the urgent regulation of CVS. Based on the integrated model, specialized software technology will be developed to support computer simulations on various aspects of the physiology of the healthy person’s blood circulation. A special simulation study should identify the causes of different scenarios for the development of hypertension. The program is written in C ++17. Problems in programming 2019; 4: 111-120