In view of the complex working environment of shipbuilding site and the large scale of hull curved plate, a computer binocular vision measurement method based on the structured light assisted scanning is proposed. ZHANG Zhengyou calibration method is used to calculate the internal and external parameters of the camera, the laser lines are preliminary extracted in the image according to the color space and morphology processing, the sub-pixel laser center lines are obtained according to Steger algorithm based on Hessian matrix, the coordinates of laser points are calculated according to the polar line matching method, and the edge points are screened according to the second-order partial derivatives. The non-contact measurement method is of high accuracy and good applicability, which can meet the testing requirements for the curved plate in the shipbuilding.