Abstract: Based onthe observation datain Chaoyang Cityfrom1970 to 2004 ,the relationship betweenthe precipitation andsoil moisture content inthe spring sowingtime was analyzed.The results showedthat the rainfall during soil freezing period(from October to November) had extremely conspicuous mutual relations withthe soil moisture content inthe spring sowingtime .It was suggestedthatthe artificial rainfall should be developedinthe period of soil freezingtoimprovethe soil moisturecontent of the spring sowingin Chaoyang district andto raise the effect and benefit of artificial rainfall .

Key words: Artificial rainfall , Artificial rainfall , Spring sowing, Soil moisture content analysis , Chaoyang District