Аннотация:The article is devoted to microfluidics (microhydrodynamics), a science that describes the behav-ior of small (micro- and nanoliter-sized) volumes and flows of liquids. Microfluidic reactors have becomewidely used in various fields of science: medicine, special chemistry, biochemistry, nuclear chemistry, andmany others. They are popular due to the increased mass and heat transfer they provide, better process inten-sification, and, as a result, high product yield. The most important elements of microreactors are the mixingzone, which ensures destabilization and swirling of flows for the purpose of mixing them, and the reactionzone (serpentine channel), calculated depending on the kinetics of a specific reaction. The work is dedicatedto the microfluidic industry and reflects one of its most important aspects, i.e., mixing. Mixing in such reac-tors occurs in a laminar mode and is carried out exclusively by molecular and convective mass transfer. Themain mixers used in microreactors, such as T-shaped and Y-shaped mixers, and typical mixing cells used ina cascade design, are investigated. As a result of the conducted research, the most successful mixer optionsare identified and the required microchannel length for complete mixing of the initial reagents for each ofthem is calculated. In order to improve the efficiency of the process, standard micromixers are proposed thatallow for a reduction in the channel length required for complete mixing of the reagents. The most successfulmicromixer is identified and cascade modeling is carried out; the minimum number of cells sufficient for asuccessful reaction is identified. In this work, the kinetics of a specific process is not considered; the lengthof the reaction channel directly depends on the specific reaction.