Soil erosion control for production and construction projects has become the focus of water conservancy entities in new era. Based on the daily rainfall data of 30 weather stations in Baoji and its neighbouring regions from 2016 to 2018, we calculated rainfall erosivity using Rr, Rm and Rn equations, which were introduced from Guidelines for Measurement and Estimation of Soil Erosion in Production and Construction Projects. Then the recommending order of the equations was given on the basis of the prediction precision, and the temporal and spatial distribution characteristics of rainfall erosivity of Baoji production and construction projects was analyzed. Results showed that Rn equation was recommended as the first option in the design of water and soil conservation schemes, whereas Rm equation was the least favorable, thus Rr fell in between Rn and Rm. The combination equation of Rn- Rr was then proposed to obtain the contour line and lookup table of rainfall erosivity, in order to meet the demands of the production and construction projects of linear and point types respectively. Rainfall erosivity during 2016-2018 ranged between 887.94 and 4 276.88 MJ·mm/（hm2·h）, which showed an increasing trend from north to south in Baoji City. There were two high value zones and two low value zones of rainfall erosivity distributing in Baoji City. This study can provide some reference for the design of water and soil conservation scheme for Baoji and Guanzhong-Tianshui economic zone.