Telescopic suite for curtain

The invention belongs to the field of connecting rails, and discloses a telescopic suite for a curtain. The telescopic suite comprises a primary rail, a secondary rail arranged in the primary rail, and a hoisting wheel, wherein notches are arranged at the lower parts of the primary rail and the secondary rail; a pair of outer rails positioned on two sides of the notch of the primary rail is arranged at the lower part of the primary rail; a pair of inner rails positioned on two sides of the notch of the secondary rail and matched with the outer rails is arranged at the lower part of the secondary rail; first sliding rails are arranged at the edges of the outer rails, and second sliding rails are arranged at the edges of the inner rails; the hoisting wheel slides on the first sliding rails and the second sliding rails along the notches; a pair of first grooves matched with the external mounting size is arranged at the upper part of the secondary rail; and support parts used for supporting the first grooves are