As a new type of ceramic material, Ti3SiC2 has the dual properties of metal and ceramic. In recent years, more and more researchers have paid attention to Ti3SiC2 due to its good electrical and thermal conductivity, low density, machinability, excellent thermal shock resistance, high melting point, high thermal stability, high temperature oxidation resistance and corrosion resistance. Firstly, the internal crystallographic structure of Ti3SiC2 was introduced and the close crystallographic relationship between it and binary carbide TiC was pointed out. Then, the research status of various preparation processes of Ti3SiC2 and its composites was described in detail, and the advantages and disadvantages of chemical vapor deposition (CVD), magnetron sputtering (MS), pulsed laser deposition (PLD), self-propagating high temperature synthesis (SHS), hot isostatic pressing (HIP), hot pressing sintering (HP), spark plasma sintering (SPS) and other technologies in preparing Ti3SiC2 and its composites were elaborated. Later, the effects of temperature, sliding speed, load, additive content, types of counterpart materials and lubrication environment on the tribological properties of Ti3SiC2 and its composites were analyzed emphatically. Finally, some problems existing in the research of Ti3SiC2 and its composites were summarized. It is proposed that further improvement of friction and wear properties, addition of multiple reinforcing phases, improvement of existing technologies and adoption of new preparation technologies are important directions for future development.