The invention discloses a photo-thermal composite curing 3D printing device and a hook face in-situ printing method thereof. The photo-thermal composite curing 3D printing device is composed of two sprayer systems, a three-dimensional motion platform, two feeding devices and a computer. Furthermore, the two sprayer systems include a photo-curing forming sprayer system and a temperature curing forming sprayer system, and collaborative printing of two forming technologies can be achieved. A hook face in the hook face in-situ printing method refers to printing on the hook face through a hook face layering method different from a traditional 3D printing plane layering method, and in-situ printing refers to direct printing at the artificial limb hook face defect position. A defect three-dimensional model is established by scanning the artificial limb hook face defect, a printing path is generated according to the size and shape of the defect, accordingly, sprayers are controlled to conduct three-axis linkage, the sprayers move along the defect face, and in-situ printing is finished. Furthermore, the device and method can be used for studying in the aspect of a hook face in-situ printing type skin structure and a cartilage-like structure.