SiC_f/SiC composites have broad prospects for application in aerospace high-temperature components due to their low density， excellent high-temperature mechanical properties， and oxidation resistance. However， residual stresses generated during preparation and service severely restrict their performance. This paper systematically reviews the research progress on residual stresses in SiC_f/SiC composites. Firstly， the formation mechanisms of micro-residual stresses and lattice distortion stresses are elaborated， and the coefficient of thermal expansion mismatch， phase transformation volume effect， and process-induced effect are identified as the main causes. Secondly， the principles， advantages， and disadvantages of experimental characterization techniques （including X-ray diffraction， neutron diffraction， Raman spectroscopy， and nanoindentation） and numerical simulation methods （such as finite element method and molecular dynamics） are introduced. Then， the regulation mechanisms of residual stresses on the mechanical properties， environmental stability， and functional characteristics of composites are analyzed， and residual stress regulation strategies through temperature gradient control， interface coating design， and heat treatment are summarized. Finally， it points out that the current frontier challenges include stress dynamic reconstruction in ultra-high temperature oxidation environments， in-situ real-time monitoring of residual stresses under complex loads and thermal cycles， and artificial intelligence-driven residual stress prediction and optimization design.