Abstract: According to feed grinder machinery manufacturers characteristics of small scale and workers concurrently，and the common and typical dangers of actual production use，a simple and targeted method to evaluate qualitative safety was put forward.Emphasis and difficulty of evaluation of mechanical safety of feed grinder machinery were analyzed.Manufacturers could determine to adopt safety and economic protection measures according to requirements of product standard and safety quality cost.Taking an example of hammer feed grinder，process and application methods of risk evaluation were described.Research showed that adopting safety evaluation method was conducive to promoting production enterprises to grasp product quality and safety from design and production links.