The invention provides special equipment for assembling of prefabricated components, the special equipment for assembling of the prefabricate components comprises a plurality of support devices arranged at corresponding support point positions, and each support device comprises top layer steel structure distribution beams, bottom layer steel structure distribution beams and a support adjusting assembly between the top layer steel structure distribution beams and the lower layer steel structure distribution beams; each support adjusting assembly comprises a middle support piece and end support pieces at two sides; the top end of each middle support piece abuts against the top layer steel structure distribution beams; a buffer board is arranged at the upper ends of the top layer steel structure distribution beams; and a wireless pressure displacement sensing unit connected with a central control system is arranged on each end support piece. According to the special equipment for assembling of the prefabricated components, the problems of difficulty of space adjustment, high additional stress and poor durability after assembly faces being assembled in the process of prefabrication assembly engineering are solved effectively, and the space posture of a to-be-assembled component can be adjusted precisely, so that meshing surfaces are matched completely. The prefabricated component is good in support stability, and convenient to operate in the construction process.