Abstract Alkenes and alkynes are inexpensive and readily available basic chemicals. Silyl radical‐participated silylation of alkenes and alkynes provides a powerful tool for the direct construction of organosilicon compounds. Compared to hydrosilylation reactions, silylfunctionalization reactions are more attractive and advantageous in building diverse organosilicon compounds, which has led to their becoming a research focus in organic synthesis. Herein, we provide a comprehensive overview of recent advances in silyl radical‐participated silylfunctionalization of alkenes and alkynes.