Detection apparatus for linearity of drilling rod

The utility model relates to a detection apparatus for linearity of a drilling rod for non-excavation pipelaying. The detection apparatus comprises a cross beam, a left support component and a right support component, wherein the cross beam, the left support component and the right support component are connected by bolts; the left support component is arranged at the left end of the cross beam; and the right support component is arranged at the right end of the cross beam. A driving roller and a second driven roller of the left support component form a left V-shaped included angle ; two first driven rollers of the right support component form a right V-shaped included angle; the left V-shaped included angle and the right V-shaped included angle form the two-support point detection apparatus; and a drilling rod is horizontally placed at the detection apparatus to carry out detection. According to the detection apparatus, the right support component can be adjusted and be installed at a proper position at the cross beam according to the length of the drilling rod, thereby meeting detection requirements of drilling rods with different lengths. Therefore, the manpower and material resources are reduced; and the detection can be carried out rapidly and effectively.