Abstract:For touching Mus musculus grow a group of quantities change of loyalty change the regulation,inquiry into it grows a group of quantities estimate method,the adoption clips the night method to investigate the every month to succeed in catching rate,use to succeed in catching rate for predict the index sign, build up the estimate forecast model. The population dynamics and population quantity of Mus musculus have been analyzed and predicted in Xifeng County, Guizhou Province from 1987 to 2005. The result showed that average annual capture rate is 3.26%±0.86%, three quantity peaks appear in one year in April, July and October. Grow a group of quantities fluctuation range and occurrences bane circumstance through the years according to Mus musculus. The Mus musculus population quantity graduation standard has been formulated. Three short and one long term prediction models have been established by analysis of the relations between each month population quantity and the population density in April, July and October. Three short term prediction models are Y1=1.5542X1－0.4258,Y2=1.3799X2+0.3213,Y3=1.1523X3+0.6890. They predict the population density in April, July and October by using the population quantity in March, June and September. The middle term prediction model which predict the past year average population density by using the population quantity of April is Y4=0.4945X4+0.8187. After the reverse running and confirmation, the value and magnitude prediction data accord to the actual data, the value prediction average tallying rate is 84.83%-93.94%, and the magnitude prediction average tallying rate is 77.78%-100%. The result of the forecast in 2005 is almost accurate by using the prediction models.