This paper analyzed a large number of investigation files, which come from the rural area of ten villages, Henan province. Result of this analysis indicated that the number and scale of rural households'migration employment is a synthetical outcome, which is affected by economic factors, family factors and environment factors. The Optimal Multiple Regression Model shows that several factors have a heavy influence on the migration employment of rural households in Henan province. First, there is a positive impact between the scale of migration employment and the benefit of migration employment, the cost of migration employment, the population statement of rural households, the expense of rural households, and so on. In addition, people who have junior high school degree will bring a forward- looking effect on the scale of migration employment, while senior high school degree or upwards will produce a negative effect on the scale of migration employment. Third, as far as the environment factors are concerned, we can get the conclusion that the development level of economy has a positive impact on the migration employment. Terrain, reachability and the land use style have a negative impact on the migration employment.