Traditional field archaeology in China is based on manual method and the main field data are delaminated ichnography and profile map of stratum and relic. Based on the original ichnography and profile data, the character of the current record method had been analyzed and the demand of data integration in field archaeology for rapid mapping and field scene 3D reconstruction had been summarized in this paper. With the object-oriented approach, we had studied the integration rules of spatial data in field archaeology, designed and completed the united coordinate datum of the original ichnography and profile maps (the keystone was transforming the 2D data to 3D one in a united coordinate system based on delaminated ichnography and profile map of stratum and relic and distributing map of rectangular units), the stitching of stratum profiles and integrated ichnography from delaminated ones based on GIS. Moreover, we had put forward an integration method of ichnography and profile data, with the stratum profiles integrated to a stitching map (the key point was constituting uniform rules for pinch-out of stratum lacunae based on the topological relation and the attribute information of the stratum) and delaminated ichnographies of rectangular unit piled up to an integrated ichnography (the key question was the integration regulation and methods based on the archaeological criterion and he spatial relations of the archaeological objects in a site and complement by GIS software), and ichnography and profile of relic integrated to a stitching map of integrated ichnography of relic. Finally, the real excavation map data, i.e. Bashidang Site, Li County of Hunan Province were used to test the above proposed method. Through comparing with the original manual integrating map the results showed that the method in this paper provided a valid and precisely faithful way for rapid mapping, archaeological report, and basic data for cultural site scene 3D reconstruction and proved to be an assistant decision tool for analyzing and studying the spatio-temporal relation of the accumulation and the vestiges in field archaeology.