Silicon photonics has emerged as a transformative technology for integrated photonics and has rapidly advanced over the past few decades. Heterogeneous integration facilitates the seamless integration of active and passive devices, including lasers and detectors, into silicon photonics systems. High-quality III-V semiconductor lasers on silicon platforms offer remarkable potential for creating cost-effective, high-density integrated light source for silicon photonics chips. This paper reviews the prevalent methods for heterogeneous integration and recent advancements in the integration of silicon and III-V semiconductor lasers, highlighting their optical applications across various chips. The development trends and future prospects of silicon-based integrated light sources are also analyzed and discussed.