The invention relates to an inspection device for a torsion beam. The inspection device comprises a base, a left front bushing support, a right front bushing support, a left front strut, a right frontstrut, a left rear strut, a right rear strut, a left front bushing presser, a rear presser, a front bushing plug gauge, a left hub axle checker, a right hub axle checker, a spring base checker and adamper bracket checker arranged on the base. The top ends of the left front strut, the left rear strut, the right front strut and the right rear strut of the present application form a fitting plane that limits the three degree of freedom of the Z-direction movement, the X-axis rotation and the Y-axis rotation of the torsion beam. Spherical surfaces of a left spherical apex and a right spherical apex limit the three degree of freedom of the X-direction movement, the Y-direction movement and the Z-axis rotation of the torsion beam. Restrictions on the six degrees of freedom of the torsion beamare realized. The various benchmarks of the inspection do not cause over-positioning and over-constraint when limiting the degree of freedom of the torsion beam. The device is easy to operate and hashigh detection efficiency.