The study is expected to research the performance，behaviors and strength of soil-nailed wall by field test，on the basis of the engineering of soil-nailed wall protection with the high bedding stone slope in Yuhuai railway in China. We test the nail force of different station on different row soil-nailed wall with steel-string transducer in the upper and bottom wall are tested. Some conclusions are achieved as follows：(1) the distribution of soil nailing tension along each soil nailing is curved，and there are one or two maximum tension points；(2) the soil nailing tension increases with time；(3) the latent failure surface position of testing value and the theoretical value is close to each other at the upper and bottom wall，but far away near the flat roof；(4) the earth pressure in the soil nailing wall is larger on middle and smaller on two sides along the height. These test results can be used as reference to the design and construction of soil-nailed wall.