The invention discloses a shear displacement measurement method, a shear displacement measurement module and a multi-parameter joint monitoring system. The method comprises the steps of: making a positioning mark on a measurement object; step 2: using a camera device to record the movement process, of the entire measurement object to obtain a string of digital image sequences; step 3: performing graphic correction and binarization processing on each digital image, and selecting a feature pixel row, wherein the selected feature pixel row is a feature pixel row vector; step 4: performing rightward cyclical displacement on the feature pixel row of a first image to obtain a new feature row vector sequence after every rightward displacement, and performing calculation on the feature row vectorsequence and the feature row vectors of other images in sequence to obtain a displacement value at each moment. According to the shear displacement measurement method disclosed by the invention, sheardisplacement data collection is performed by using a non-contact measurement method. Compared with a traditional sensor-based contact measurement method, the instrument installation is very simple and convenient, so that a soil body shear experiment can be performed efficiently and orderly.