The invention discloses an omega-shaped sliding block type rapid inspection fixture for inspecting degree of symmetry of an elastic strip and an inspection method. The inspection fixture comprises a base, a reference locating plate, a reference shaft and sliding blocks, wherein the reference locating plate, the reference shaft and the sliding blocks are arranged on the base, the reference shaft is fixedly installed on the center line of the base, the sliding blocks are symmetrically installed on the left side and the right side of the reference shaft, a pointer is arranged on each sliding block, and scale marks corresponding to the pointers are arranged on the base. Compared with the prior art, the omega-shaped sliding block type rapid inspection fixture has the positive effects that the measurement flow is simplified, the pointers are matched with the scales of dial plates after the elastic strip is in place, no vernier caliper is needed in use, calculation is not needed, and the amplitudes of swing of the pointers are directly used to measure whether the degree of symmetry of the elastic strip is over the limit or not.