n order to cope with the cracks of the concrete retaining walls of the "U"shaped road channel from DK35+607 to DK36+028 on LongyanXiamen Railway, embedded concrete strain gauges are used to measure the concrete strains. The distribution pattern and timedependent varying pattern of the internal stresses and strains of the concrete are obtained. The position, time and cause for the probable cracking zones of the concrete retaining walls are analyzed and countermeasures are proposed to control the cracks. This paper can provide reference for similar projects in the future.