Abstract: To obtain the distribution pattern of earth pressure acting on the supporting structures in sandy cobble ground, the in\|situ monitoring data of earth pressure from a typical deep foundation pit in sandy cobble ground in Chengdu was analyzed. Results show that the distribution pattern of actual earth pressure is non\|linear in sandy cobble ground. The value of actual earth pressure of the range of three meters on the top of pile is between the classical Rankine's active earth pressure and the static earth pressure and the one of the other parts is far less than classical Rankine's active earth pressure. The influence between the horizontal displacement and the earth pressure on the ring beam and excavation surface is very little. Then the rationality of this occurred situation was analyzed. It has important reference value for supporting system's design of the similar deep foundation pit.