Sample test piece fixing device for corrosivity experiment

The invention discloses a sample test piece fixing device for a corrosive experiment. The sample test piece fixing device comprises a main rod, and a sliding block assembly, a supporting assembly and a supporting frame which are arranged on the main rod, a plurality of sample test pieces are fixed on the column rod and located between the supporting assembly and the supporting frame, a plurality of ejector rods are evenly distributed on the circumference of the supporting assembly, the sliding block assembly is connected with the supporting assembly, the sliding block assembly moves in the axial direction of the main rod to enable the ends of the ejector rods to abut against the inner wall of a pipeline, and the ejector rods are driven by sliding to move in the radial direction. Meanwhile, the whole fixing device is fixed by combining with a supporting frame, the fixing device can adjust the contact pressure between the ejector rod and the pipe wall through the sliding block assembly, meanwhile, the fixing de