Leakage-proof detection device for valve processing

The invention relates to the technical field of valve detection, in particular to a leakage-proof detection device for valve machining, which comprises a first telescopic cylinder, the first telescopic cylinder is fixedly mounted on a base, a first pressing plate is fixedly mounted at the end part of a piston rod of the first telescopic cylinder, and a positioning column is fixedly mounted on the inner side of the first pressing plate; a first external connecting pipe is arranged on the outer side of the first pressing plate and communicates with the interior of the valve through the first pressing plate. The inner side of the bending and twisting mechanism is provided with a second pressing plate, the inner side of the second pressing plate is fixedly provided with a positioning column, the bending and twisting mechanism drives the second pressing plate to generate off-axis motion, and through the arrangement of the bending and twisting mechanism, the valve can bear the force deviating from the axis when lea