According to the present invention, the first and second structures spaced apart from each other in front and rear, and ridge poles and connecting pipes interconnecting the structures are formed in a square pipe shape, and have strong resistance to warping and bending, As the assembly between each other is assembled using bolts and nuts by plate type connecting brackets, it is easy to install and dismantled, and the bonding force is excellent. In particular, the rafter constituting the roof structure is composed of two powders, and the interconnected two powders form a curved arch shape to provide a curved arch type multipurpose prefabricated building structure that can withstand the impact or fatigue load caused by hail, heavy rain, heavy snow, and the like. In order to implement this, the curved arched multipurpose prefabricated building structure according to the present invention includes two posts which are erected to be spaced apart from each other, and a rafter for connecting the upper ends of each of the two posts to be spaced apart from each other. First and second structures disposed； And a ridgepole and a connecting pipe for connecting the rafters and the posts facing each other in the first and second structures. The posts and the rafters of the first and second structures, the ridge poles and the connecting pipes each have a square cross section, and the rafters of the first and second structures are formed of two powders that form an arch shape. The two powders of the post and the rafter of the first and second structures, the ridge pole, and the connecting pipe are each formed with bolt fastening holes, and have square seating grooves for the bolt corresponding fastening holes and the connecting pipe, respectively. A first connecting bracket is used to fix the two posts of the structure and the rafter to each other, and has a bolt corresponding hole and faces the rafters of the first and second structures and the ridge poles and the first and second s
