<p>A model coefficient algorithm has been determined according to the reaction principle and the mass conservation principle of the hydrometallurgy of selenium-rich materials. The distribution model of valuable elements in the hydrometallurgical recovery process of selenium-rich materials was constructed by the Java source program, so as to quantitatively estimate the distribution mass ratio of kerosene desulfurization, oxidative acid leaching and sodium sulfite reduction, and to predict the recovery rate of each valuable element. By comparing with the actual optimization conditions, the change trend and distribution of valuable elements in selenium-rich materials were analyzed. It was concluded that the content of selenium was 99.75% and that the distribution ratio was 98.06% in the selenium precipitation products. The results show that the distribution model can be used to simulate and optimize the distribution of valuable elements in hydrometallurgy, and then improve the weak links according to the specific situation, so as to improve the recovery rate of valuable elements in hydrometallurgical selenium-rich materials.</p>