The invention discloses a device for collecting crushed rock in split Hopkinson pressure bar test and a using method thereof. The device comprises a bottom box and a top box, wherein the top box is covered on the bottom box; corresponding semicircular lower cutting openings and upper cutting openings are formed in the centers of two sides of each of the bottom box and the top box respectively; thebottom box and the top box are connected with each other through connection parts which are arranged on the front side and the back side in a length direction; a rectangular opening structure passingthrough the inside of a box body is formed in the lower middle part of one side of the bottom box in the length direction; a drawer passing through the opening part is arranged in the bottom box; thetop of the drawer is of a structure with a rectangular top and an arc-shaped bottom. According to the device, the drawer with the arc-shaped bottom is capable of ensuring that all the crushed piecescan be collected; the problem that part of detritus is left in corners in the collection process is avoided; the test efficiency is improved; the device is convenient to use.