With the development of automation, advanced electronics, and material technology, soft robot technology is being robustly investigated. However, there are still many hurdles in realize the ability of the human fibrous muscles to spontaneously respond to a wide range of external stimuli. Inspired by the spooling of a spider's capture thread in a wetting droplet, here, we demonstrate the elastocapillary action of an in-drop fibers inside a wet liquid droplet to realize unique force-responsive artificial muscles with sustainable self-recovery. Additionally, the force-modulated actuators inspired by nature can respond to a wide range of forces beyond sub-µN via integrating fibrous solid/liquid hybrid microstructures.