The invention discloses a sun-shading screen for a driver cab, which can solve the problems of complex structures, difficult synchrony, incomplete glass hiding by rolling screens and easy damage in the prior art. The invention adopts the technical scheme that the sun-shading screen for the driver cab comprises a rolling screen mechanism, a driving mechanism and an actuating mechanism. The drivingmechanism uses a motor to cause a cable pulley to rotate through a reversible decelerating mechanism, the cable pulley is twined by a wire cable, and the closed-loop wire cable drives slide blocks ona sliding rail to move synchronously in the same direction. During the sliding process, two inner pipes inside a driving rod are spirally arranged through wire ropes in order to realize synchronous sliding in opposite directions. An outer pipe is connected with a main rolling screen, and the inner pipes are connected with an auxiliary rolling screen, thereby driving the rolling screens to synchronously extend or retract. The sun-shading curtain for the driver cab has the advantages of synchronous rolling screens, large shading area, simple structure of the driving mechanism, low cost and highsecurity.