The invention provides a determining method for grooved filter stick feature parameters. A determining device used by the method comprises a workbench, an annular light source, a digital camera, a sample plate, and a computer with a built-in grooved filter stick feature parameter determining program. The determining program has the following functions: scaling sample images, recording groove number, displaying concentric circles, identifying groove depth data, calculating average groove depth, displaying normal, identifying groove width, calculating average groove width, calculating groove area and groove area ratio, and calculating standard deviation and variable coefficient of part of parameters. The determining method includes: computer calculating, computer synthesis, and displaying and outputting data through the computer. By increasing resolution of the digital camera and upgrading the computer program, automation level and determining precision are increased, groove width determining and groove area determining are added, comprehensive determining data is achieved, and convincing determining of grooved filter stick features is achieved.