Abstract: The mechanical test for fuel assembly needs to measure the physical parameters of the stress point in different parts of fuel assembly. The strain test for these stress points only can be realized by sticking the strain gauges. However, the structure of the fuel assembly is complex and compact, and it is difficult to implement the stickup of the strain gauges. In this article, a kind of new strain gauge stickup technique is developed to make the stain gauges easily and reliably stuck on the narrow space of the fuel assembly guide tube. The test results show that the test data of the strain gauge are effective and reliable.