On June 1,2022,an M6.1 earthquake struck Lushan County in Sichuan Province. The Sichuan Earthquake Early Warning Network adeptly processed and disseminated early warning information for this seismic event. This paper evaluates the early warning processing capabilities and disaster mitigation efficiency of two systems within the network:the Joint Earthquake Early Warning(JEEW) and Earthquake Early Warning(EEW) systems. Utilizing a fusion decision system,the early warning outputs from multiple seismic warning subsystems were synthesized and refined. The initial earthquake warning was issued a mere 6 seconds post-seismic event. When juxtaposed with the official earthquake catalog,the initial warning exhibited a 2.4km deviation in epicenter location and a 1.4 unit deviation in magnitude. The earthquake warning blind area has a radius of 12.3km. For regions with an effective early warning benefit and experiencing earthquake intensities of Ⅶ and Ⅵ,outside this blind area,a warning time of 0 to 6 seconds was provided,demonstrating significant disaster reduction efficiency. Drawing from this case study,the paper further scrutinizes the quality of observational data,parameters influencing earthquake early warning,and the overall efficiency of the early warning system. Such an analysis holds substantial value,offering critical insights for the assessment of early warning processing capabilities and their contribution to disaster mitigation.