The invention discloses a sieve-bend screen capable of increasing the effective area of screen surfaces, belongs to the technical field of sieve-bend screen equipment, and aims to effectively improve the treating capacity and the screening efficiency of the sieve-bend screen. The technical scheme is that the sieve-bend screen consists of a feeding box, a screen box, a support, an upper screen surface, a lower screen surface, a steel pipe supporting plate and treadle bars, wherein the bottom of the screen box is arranged on the support; the arc-shaped upper screen surface and the arc-shaped lower screen surface are arranged in the screen box; the upper screen surface and the lower screen surface are arranged in parallel up and down; the lower end of the upper screen surface is connected with the upper end of the lower screen surface, and the connection part is supported by the steel pipe supporting plate; the two sides of the upper screen surface and the lower screen surface are fixed on two sides of the screen box through the treadle bars; the feeding box is positioned above the screen box; a discharge port of the feeding box is opposite to the upper screen surface; and a discharge port is formed on the lower part of the screen box. On the premise that equal width, equal wrap angle and equal separation size are not changed, a screen surface is additionally arranged on the sieve-bend screen to improve the treating capacity and the screening efficiency, so that the sieve-bend screen has the advantages of simple structure, convenience for replacement of a screen, high treating capacity and high screening efficiency, and the using effect is remarkable.