Becker set up a human capital investment model by using the traditional microcosmic equilibrium analysis method and applied it to the decision-making process of enterprise on-job training.From the perspective of social and organizational attributes of human capital,this paper discusses the on-job training in human capital based on Becker's two assumptions.A general on-job training investment decision-making model based on loyalty coefficient is pointed out by introducing employee loyalty and cost of employee turnover loss as two new variables.