The invention discloses a multifunctional composite inspection tool device for machinery. The device comprises a first inspection tool and a second inspection tool, wherein each of the first detectiontool and the second detection tool is provided with a bottom plate; the first detection tool and the second detection tool are symmetrically arranged; turnover mechanisms are symmetrically arranged between the two bottom plates; first support seats are arranged at positions, close to the four corners of the first inspection tool, of the bottom plate; second support seats are arranged at positions, close to the four corners of the second inspection tool, of the bottom plate; and a nitrogen spring is arranged at the ends, close to each other, of the two bottom plates and located between the twoturnover mechanisms. According to the device, data of two products can be respectively detected, data after the combination of the two products can be also detected, and the quality of a single product in a product generation process can be controlled. The quality of finished products after product combination can also be controlled, so that the detection range is wider, and the detection mode ismore flexible.