The paper deals with the implementation of machinery in humanitarian demining of agricultural land in the Republic of Croatia. After the war around 10% of Croatia’s surface area was declared mine-polluted teritory. In the year 2005. the percentage of machine demining in Croatia amounted to a very high 85% of treated area, while there were no casulties. This points out that there is only a very small percentage of the mine suspected areas where machines could not have been used. These areas were not suitable for machine demining (rocky areas, soil of low bearing characteristics such as marsh land, forest areas etc.). Machines have contributed to higher performance, improved safety and quality of work as well as lower price of demining. This is the result of understanding their role and development for the actual demining conditions. According to the diversity of the ground clearing tasks, machines are designed in several categories: light, medium and heavy. In most cases machines with flails perform demining better than machines with a tiller. Especially light and medium flails have advantages in very demanding intersected regions, in easier access to the areas, in forests and around demolished houses. Based on the theory of soil treating, effects of mine explosions on human safety and machine performance, the original machine models are designed, allowing feasible technical solutions.