Abstract: With the development of designing techniques, missiles have more and more varieties, and slender missiles have been commonly designed. There are special requirements on the measurement of high-speed dynamic stability derivatives for slender missiles. In contrast to conventional missile, slender missiles during dynamic tests encounter much more technical difficulties such as no space for the installation of angular balances inside test models and low measurement precision due to small magnitude of dynamic rolling moment. A new measurement rig for dynamic stability derivatives was developed to measure the rolling derivatives exerted on a slender missile in FL-1 wind tunnel. Compared with traditional rigs, the newly developed one achieves following improvements. First, the type of motion transform was changed leading track to inner and outer circle. Second, the angular balance was moved to the sting aft from inside the model. Third, the force-measuring balance was designed with special structures.The rolling derivatives were gained successfully exerted on the missile with a length-to-width ratio of 18. In order to validate the reliability of the new rig, some validation tests were conducted on a previous mode, which already has some test results from conventional rigs. The test results show that the measurements by different rigs have an excellent repeatability for direct damping derivative.