Soil column is used to study the characteristics of calcium movement in uprightness direction in Brown-soil which is in a middling rainfall condition. The result shows that with the increase of calcium which input to the soil,the availability calcium is markedness increased by 2.2%~22.4%, and theloss of the calcium is markedness heighten to 48.6%~80.4%; suitable combination of calcium and phosphorous can make the eluviate rate reduce by 31.8%,the summation of availability calcium increased by 6.0%.When the content of calcium and phosphorous is 11, it can enhance the availability calcium in soil effectually and reduce eluviate rate of calcium.