An experimental acquisition system was designed for the feasibility research about the exterior placement of pressure sensor of pressing cylinder on acid rolling line, by aimed at the problem of placement. Based on using of the system, experimental analysis was carried out about the placement method. The results show that under static pressure, the relatively maximum pressure loss value in straight oil pipeline is 068% all the way, and the value in curved oil pipeline is 236% all the way. The loss of straight pipeline is smaller than that of curved. The exterior placement method of the pressure sensor is feasible under the static pressure experiment.