Abstract: This paper applies the binary logic model to analyze the impact of basic skill on migrant workers' participation decision of vocational skills training, and on this basis applies the propensity score matching method to estimate the impact of vocational skills training on their income by using the data of China Labor Force Dynamic Survey, The results show that there is an ability-based selection phenomenon for migrant workers to participate in vocational skills training , that is, the probability of migrant workers with high basic skill is significantly higher than that of individuals with low basic skill under the same control variables. The results also show that the income effects on migrant workers participating in and not participating in vocational skills training are significantly different when the individual basic skill variable is controlled although the training can significantly improve the wage rate of migrant workers on the whole. The estimates show that the migrant workers' wage rate with skills training is not increased significantly; and the migrant workers’ wage rate without skills training would be significantly increased if they were trained. However, the probability of migrant workers with low basic skill participate in training is significantly reduced due to the selectivity, Therefore, how to improve the training participation rate of the group with low skill should be the key consideration of the government and relevant departments before formulating corresponding policies or carrying out training.

Key words: Migrant Workers; Vocational Skills Training; Basic Skill; Propensity Score Matching; Selection Bias