The invention provides an archaized building concrete upturned roof ridge design and construction method based on computer assistance. The method includes the fourteen steps of preparing for design work, drawing a front face rafter, determining the spatial size of an upturned roof ridge, obtaining the curve radius by means of the corner beam center, obtaining new three-dimensional space data of the upturned roof ridge, drawing an upturned roof ridge rafter hinged tail, drawing three-dimensional space upturned fly rafter points, drawing upturned fly rafters, drawing supporting meshes at the bottom of the two rafters of the upturned roof ridge, drawing a supporting mesh size numerical value graph, drawing interlining wood, positioning the three supporting meshes of the upturned roof ridge, producing pouring concrete and the like. On one hand, as the design flow of an archaized building upturned roof ridge structure is effectively standardized, which is beneficial for setting up a database for upturned roof ridge design, the accuracy and the high efficiency of the upturned roof ridge structure in an archaized building can be greatly improved, and the working efficiency and quality of the upturned roof ridge design work are improved; on the other hand, the accuracy of actually producing and manufacturing the upturned roof ridge structure is improved easily, material loss is reduced, the production quality of the upturned roof ridge is improved, and therefore the effects of reducing the construction cost of the building and improving the construction quality of the building are achieved.