ABSTRACT. Optical frequency comb (OFC) is a new discovery, whose impact is expected to be as profound as the invention of laser if not bigger, covering wide applications of optical communication, biosensing, quantum technology etc. The development of OFC is towards miniature and energy efficiency reflected by the journey from mode-locked OFC through fiber laser OFC to microcomb. Although the microcomb is a very new concept, different materials have demonstrated it leveraging the third-order nonlinearity of the material and dispersion control at nanometer scale. Among them, SiC is emerging. In this invited talk, both Kerr comb and Raman comb are demonstrated on 4H silicon carbide on insulator (SiCOI) platform after SiCOI waveguide loss reduction, coupling scheme optimization and dispersion engineering. Amorphous SiC shows even higher nonlinear refractive index compared to 4H SiC, which is vital to generate Kerr comb. If the material loss could be optimized to the same level of 4H SiC, it is also very promising to demonstrate Kerr comb from amorphous SiCOI. Challenges and perspectives of SiCOI based comb will the presented at the end of the talk.The support of the European Union's Horizon 2020 FET Open project (SiComb, No. 899679) is gratefully acknowledged.