Fengshui decoration vividly reflects modern environmental psychology, and brings different feelings to people from the overall feeling of decoration. Sharp, irregular or polygonal shapes should be avoided when choosing the decoration shape of the ceiling of the porch corridor. The ceiling of the porch corridor is the first household space that comes into contact with when entering the room, and the sharp diamond pattern will directly impact the people who enter the room. As the throat of home, the porch corridor has the function of making money in geomantic omen. If the ceiling of the entrance corridor is designed as a diamond, then the sharp corner is right.