In order to evaluate the effectiveness of heath education on re-infection with intestinal worms and physical growth among primary school children in rural areas, a study was carried out in 25 primary school of Ha Nam province, using design of "randomized controlled intervention trial”. Obtained results showed a remarkable effectiveness of heath education on the improvement of knowledge and the change of behavior in prevention and control of intestinal worm infection, and as the results, re-infection was reduced remarkably; The positive effect of the intervention on improvement of nutritional status of children after 6 months has not found, yet; The observed results suggest-ed that it is needed to have more time for intervention so that the nutrition status could be improved.