Lightweight flexible control arm

The invention discloses a lightweight flexible control arm. The flexible control arm comprises a fixed base, a flexible beam, a device interface, driving ropes and a power structure; one end of the flexible beam is fixedly connected with the fixed base, and the other end of the flexible beam is connected with the device interface; the driving ropes are arranged on the two sides of the flexible beam, one ends of the driving ropes are connected with the device interface, the other ends of the driving ropes are connected with the power structure, and the device interface pulls the driving ropes through the power structure to achieve movement; and different mounting devices can be selected for the device interface according to use requirements, for example, a spray gun is mounted for realizing a spraying function or a vehicle body surface quality detection device is mounted for realizing a vehicle body surface quality automatic detection function. The problems of cost and light weight of a spraying robot are solv