Peasant workers' vocational training is an important way to invest in human capital,and also the highlighting of new-typed urbanization with the core idea of people-oriented.Cognitive inertia is the current realistic constraintof carrying out the policy of peasant workers' vocational training,which is also result of interaction between cognitive limits of peasant workers and the lack of environment incentive.It should be promoted from several aspects such as improving peasant workers' income and enhancing the social security system;strengthening the efforts of governmental transferr payment and conforming social resources;guiding employing units to construct a salary management system based on skill difference;perfecting the current training system to avoid crowding-out effect;strengthen publicity and communication.