Abstract: The compressive performance is the basic mechanical properties of the glue-lumber, in order to measure the elastic modulus and compressive strength of the glue-lumber accurately, the compressive test was conducted on three batches which totally including 18 first-grade SPF specimens, the experimental results were compared and analyzed, the appeared errors were studied and the improvement scheme was given out. The results showed that, with the influence of the laminates distribution, the strain can't be measured accurately by the strain gauge; The prism glue-lumber specimens was used to decrease the influence of the end local pressure, which can get the most accurate data; In the middle of the specimen, double-clip type extensometer was used to measure the deformation, which can get the most proceed data. The achievements can be the basis for the improvement of the timber compression properties test.