In order to study the dynamic connection process of the development of lightning downlink leader and ground protrusion uplink leader,the main characteristics and development rules of lightning shield development are analyzed.According to the characteristics of the uplink pilot current pulse cluster,this paper designs the uplink pilot current pulse cluster simulation generator.The whole design is based on STC12C5A60S2 single-chip microcomputer as the core controller,which mainly includes the single-chip microcomputer control circuit,optocoupler drive,charge and discharge circuit and signal acquisition,4 modules in total.