Abstract: As limestone powder preparation station general lay in the area away from the boiler room because of the big size,so that the limestone powder conveying system has large operating energy consumption.This paper introduces a design and application of a compact limestone powder preparation sation according to baima 300MW CFB power plant limestone powder system transformation project.Limestone preparation station can lay near the boiler house,and it provides a new idea for the optimal design of limestone powder system in the future.