By analyzing laws of brewing grape fruit growing and contained sugar accumulation,it shows that fruit growing trends parabola has two obvious growing peak value. The growing key time occurs from the first ten days of July to the first ten days of August,whose growing rate is 64—78 percent of total rate; contained sugar accumulation follows “S” function model. The key time of sugar accumulation occurs from the middle ten days to last ten days of August,whose sugar accumulation is fastest,daily accumulation sugar content is 0.48%—0.84%,pure accumulation sugar content is 73%—77% of total accumulation sugar content. The key factors of sugar accumulation are of main light temperature accumulation and daily range of temperature. The longer the sunlight time,the higher temperature,the faster sugar accumulated,the higher the grape contains sugar content. The grape climate model of sugar accumulation is developed and it can estimate sugar content geographical distribution in various climate areas of Hexi corridor,and therefore it can provide scientific basis for grape breeds selection.