The invention discloses a high speed air cannonball launch speed capture apparatus which comprises a cannonball capture pipe, a capture pipe front bracket, a capture pipe rear bracket, a front hydraulic lifting column, a rear hydraulic lifting column, a front seat and a rear seat. The cannonball capture pipe is provided with a cannonball speed measuring unit. The upper ends of the capture pipe front bracket and the capture pipe rear bracket are hingedly connected with the lower wall of the cannonball capture pipe through a first hinge and a second hinge respectively. The lower ends of the capture pipe front bracket and the capture pipe rear bracket are fixedly connected with the upper ends of the front hydraulic lifting column and the rear hydraulic lifting column respectively, wherein thefront hydraulic lifting column and the rear hydraulic lifting column are vertically arranged. The front hydraulic lifting column and the rear hydraulic lifting column are arranged on the front seat and the rear seat respectively. According to the invention, the structure is simple; the attitude adjustable cannonball capture pipe is used; and the cannonball capture pipe can be correspondingly adjusted according to the change of the launch angle of a barrel at any time to ensure that the cannonball capture apparatus can adapt to various launch angles of an air cannon.