Abstract: The influence of load cell position on bearing capacity of 3 piles using Osterberg pile testing technique is analyzed. with their predicted values, h is found that when the load cell is positioned high or low to the bottom of the pile, the obtained bearing capacity is lower than the actual value. A suitable method is presented. The simulation test method, which bases on classical Mohl- Colum intensity theory and the friction simulation test between the pile and the ground, help to get the optimum position. The conclusion drawn from the method is more accurate than the other two methods.