The invention relates to a mechanical processing strip cutting machine, in particular to a strip cutting machine for a tape measure. The strip cutting machine comprises a machine frame, an unreeling mechanism, a tension mechanism, a belt conveying mechanism, a visual control system, a die cutting device, a belt outlet device and a sorting device, wherein the unreeling mechanism, the tension mechanism, the belt conveying mechanism, the visual control system, the die cutting device, the belt outlet device and the sorting device are sequentially arranged on the machine frame, the belt conveying mechanism comprises a first upper wheel, a first lower wheel and a first air cylinder, the first air cylinder is connected with the first upper wheel, the first upper wheel and the first lower wheel are vertically tangent, the tape measure passes through a position between the first upper wheel and the first lower wheel, the work intensity of workers is also greatly lowered through an automatic sorting device, the sorting quality is also ensured, the workers only need to replace a material disc, the tape measure is manually guided to the belt conveying mechanism, the mechanism can be started for carrying out the fully automatic tape measure strip cutting, the production efficiency is greatly improved, meanwhile, the influence of the proficiency degree of the workers on the product quality is also reduced, the equipment interface is simple, the learning is easy, and the long-period training is not needed.