Comprehensive mechanical property test device of fuel assembly and test method thereof

The invention discloses a comprehensive mechanical property test device of a fuel assembly and a test method thereof. The comprehensive mechanical property test device of fuel assembly comprises a horizontal supporting platform (9) and a vertical supporting platform (10) placed on the horizontal supporting platform (9), wherein a base (3) is installed on the horizontal supporting platform (9), at least three loading upright posts (8) with axial lines vertical to the upper surface of the horizontal supporting platform (9) are installed on the base (3), and at least two measuring upright posts (2) with axial lines vertical to the upper surface of the horizontal supporting platform (9) are installed on the base (3); a loading head plate (1) is arranged above the base (3), the loading head plate (1) is connected with the vertical supporting platform through a connecting element, and the ends away from the base (3) of the loading upright posts (8) penetrate through the loading head plate (1). The comprehensive mechanical property test device disclosed by the invention can be installed at one time and finish a variety of tests. The device is convenient to install and operate and is easy to detach, and the test steps are few.