The invention relates to a clamp for a silicone structural adhesive pollution test. The clamp comprises a bottom plate, wherein a fixed blocking block is arranged at one end of the bottom plate; the other end of the bottom plate is equipped with a movable blocking block which is close to or away from the fixed blocking block in a sliding mode; the fixed blocking block comprises a first U-shaped frame; first wings are symmetrically arranged at a slot hole of the first U-shaped frame; a first placing slot is formed between the first U-shaped frame and the first wing; an adhesive slot is formed between the first wings; the movable blocking block comprises a second U-shaped frame; the slot hole of the second U-shaped frame is opposite to the slot hole of the first U-shaped frame; second wingsare symmetrically arranged at the slot hole of the second U-shaped frame movably; third wings which correspond to the second wings are symmetrically arranged in two parallel side walls of the second U-shaped frame; a second placing slot is formed between each second wing and each third wing; and a drive device for driving the movable blocking block to horizontally slide is arranged on the bottom plate. The clamp can be used for stretching and compressing silicone structural adhesive without mounting a stone test part for a second time while performing the pollution test, and is convenient to operate.