Environment test device suitable for composite material component

The invention discloses an environment test device suitable for a composite material component. The device comprises a constant temperature and humidity bag (5) connected with an environment test chamber (18) and used for wrapping the composite material component (3) performing the environment test; the constant temperature and humidity bag (5) is isolated from the atmosphere; the environment testchamber (18) and the constant temperature and humidity bag (5) are connected through a gas conveying pipe (8) and an air inlet pipe (9) so as to realize the control on the temperature and humidity inthe constant temperature and humidity bag (5). The large fatigue test or static test can be performed in the hydrothermal environment by using the constant temperature and humidity bag structure, sothat the fatigue test and static test under the hydrothermal environment become possible. While performing the mechanical test, most of the whole mechanical test machine and test clamp is located outside the constant temperatur