The utility model provides a corner component for installing frame fan sealing strip, relates to a component of installing the sealing strip. The purpose is that the sealing strip carries out 90 the back of buckling in the notch for the mutually perpendicular in the sealing strip mounting window fan bight of solving the frame fan, and the sealing strip of the department of buckling takes place towarp, the thickness increase, and then make a sound the even laminating of sealing strip and window frame and buckle the seal wear of department and compare the serious problem of sealing strip wearing and tearing without buckling. This component main part is equilateral right angled triangle board form, and the hypotenuse be the arc, and two straight flange edges being close to right angled triangle board are provided with first corner component fixed slot and the second corner component fixed slot that is on a parallel with the right angled triangle board straight flange respectively, is provided with the arc sealing strip mounting groove of the hypotenuse that is on a parallel with right angled triangle board near right angled triangle board's hypotenuse edge. It is excessive that the curve that becomes is buckled by current 90 to the sealing strip that should the component enables the casement bight, and the range of buckling of sealing strip diminishes, and seal wear diminishes, has prolonged the life of sealing strip.