This　paper　investigates　an　event-triggered　tracking　control　problem　of　nonholonomic　systems　in　chained　form.　We　first　design　a　time-varying　controller　while　ignoring　the　sampling/triggering.　Then,　the　event-triggered　control　strategy　is　considered　and　a　dynamic　event　trigger　is　proposed　to　reduce　the　information　transmission.　The　solutions　of　nonholonomic　systems　in　chained　form　are　proved　to　be　uniformly　globally　asymptotically　tracking　the　desired　reference　trajectory　under　some　standing　assumptions.　Our　analysis　is　based　on　Lyapunov＇s　direct　method　and　an　explicit　global　strict　Lyapunov　function　is　constructed.　Furthermore,　the　Zeno　behavior　is　avoided　and　a　positive　lower　bound　between　any　two　triggering　instants　is　ensured.　Finally,　a　simulation　example　is　provided　to　illustrate　our　results.　©　2022　Technical　Committee　on　Control　Theory,　Chinese　Association　of　Automation.