Performance testing device for acid fracturing fluid and application thereof

A performance testing device for acid fracturing fluid, comprising:

• two semiterete rock core holders having a curved face side, a flat face side and two opposite semicircle sides, the flat face side of the two semiterete rock core holders being arranged opposite to each other and being able to fix a rock core to be tested;
• the two semicircle sides of the two semiterete rock core holders being provided with a rotation member which is opened with a first groove;
• when the flat face sides of the two semiterete rock core holders being spaced apart at a predefined distance, the two rotation members being able to cooperate to form a first rotation axis, and the two first grooves being able to cooperate to form a first through hole;
• the two semiterete rock core holders being able to rotate about the first rotation axis, and the first through hole being able to be in communication with a gap formed between the rock cores fixed by the flat face sides of the two semiterete rock core holders;
• a pressure applying shell having a recessed portion that matches with the curved face side of the semiterete rock core holder, the recessed portion being able to rotatably cooperate with the curved face side, the pressure applying shell being able to apply a pressure to the two semiterete rock core holders to make the two flat face sides thereof joint in a manner of surface contact.