With the popularization of component blood transfusion and the full use of resources, the number of blood component preparation has increased sharply. In the preparation of blood components, large-capacity cryogenic centrifuges are commonly used. After the collection of blood bags can not be completely equal, if not balanced, accelerated machine wear, noise, vibration increase, directly affect the quality of platelets and concentrated red blood cells. Therefore, blood trim is an important prerequisite to ensure the quality of separation. The intelligent trim instrument developed by our company and with known property rights solves the above problems and fills the gaps in the industry; It greatly improves the efficiency of composition preparation, and is a special ideal equipment for the preparation of blood components.