Temporary plugging ball impact and polishing testing device and method for shale gas horizontal well fracturing

The invention discloses a temporary plugging ball impact and polishing testing device for shale gas horizontal well fracturing. The device comprises a circulating pump, a liquid tank, a sensor and animpact and polishing test part, the impact and polishing test part comprises a ball throwing vertical pipe, a plugging ball backflow vertical pipe, an acceleration impact short section, a spiral polishing oil pipe and a solid capture blocking short joint. The plugging ball backflow vertical pipe is arranged on the downstream of the ball throwing vertical pipe, the two ends of the plugging ball backflow vertical pipe are connected with an inlet of the acceleration impact short section and the solid capture blocking short section respectively, and an outlet of the solid capture blocking short section is communicated with the liquid tank. According to the invention, the impact and polishing testing device is designed; the influence of equipment and a manifold on the temporary plugging ball issimulated, meanwhile, a c