Space angle measuring device

The invention provides a space angle measuring device. The space angle measuring device comprises a bottom plate, a first laminating board and a second laminating board, wherein scale lines are arranged on the bottom plate and are distributed in a radial manner relative to the center point of the bottom plate; the first laminating board is movably arranged on the bottom plate; the second laminating board is movably arranged on the bottom plate; the first laminating board and the second laminating board are perpendicular to the bottom plate. According to the space angle measuring device disclosed by the invention, the first laminating board, the second laminating board and a to-be-detected object are laminated, so that an angle between two surfaces of the to-be-detected object can be conveniently detected, and the problems that the to-be-detected object is not easy to measure by a light projector due to a relatively large dimension in the prior art. Besides, the space angle measuring device does not need to measure the to-be-detected object, the to-be-detected object can be moved away after two laminating boards are completely adhered with two surfaces on the to-be-detected object, so that the problem that the difficulty in fixing the to-be-detected object on the detecting device is relatively large is solved.