Cellular heterogeneity is essential to biological processes, such as embryonic development, cell differentiation, and the progression of disease. Recent years have seen the development of a variety of single‐cell multiomics technologies that systemically codetect the genome, epigenome, transcriptome, and proteome for single‐cell heterogeneity evaluation comprehensively. Microfluidics has emerged as a significant tool for single‐cell multiomics techniques, enabling the analysis of the complex regulatory network associated with genome coding, epigenome regulation, and transcriptome/proteome expression in a single cell with increased detection sensitivity, accuracy, throughput, and integration. A review of state‐of‐the‐art microfluidic single‐cell multiomics analysis is presented here. Various microfluidics for isolating single cells are introduced first, highlighting their advantages, disadvantages, and applications in single‐cell sequencing. Then, a comprehensive overview of microfluidic single‐cell multiomics techniques is provided. In addition, a brief introduction of single‐cell multiomics analysis in biological applications and clinical settings will be presented. Finally, we will conclude by discussing the future challenges and prospects of this field.