Abstract: Snowfall in spring is one of the most important weather process,sometimes it appears with great temperature drop and gusty weather at the same time,forming cold tide.Causing great inconvenience to agriculture production,transportation and citizens lives,so reporting properly waterfall in spring is one of the most important subjects on meteorological service in manchuly area.The article,after surveying and analyzing historical weather charts in March-May in Manchuly area,from high sky at 500-700hpa and ground situation and performing analysis on circular current character of Japanese fax chart（850hpa、782hpa、502hpa） draws conclusion of the above report on mid-rain process in spring,providing reference for report service in future.