Radion($phi$), the 55-component(graviscalor) of the five-dimensional Randall-Sundrum(RS) graviton is required to stabilize the size of the fifth spatial dimension. Being a lighter d.o.f (lighter than the RS spin-2 graviton), radion possesses a lot of interesting phenomenology that are worthwhile to explore. Here we make a direct collider search of radion at the Large Hadron Colliedr(LHC): $p p ightarrow phi ightarrow ZZ ightarrow l^+ l^- (l=e,mu)$, the so-called gold-platted channel. After making a detailed analysis of the signal and the background, we obtained constraints in the plane of new physics parameters radion mass $m_phi$ and radion vev $langle phi angle$. Finally, we briefly discuss other radion related studies.
