Continuously reinforced concrete pavement (CRCP) will break into separate slabs in the longitudinal direction a few months after its construction.Based on the calculation results of finite element method (FEM), a simplified formula of separate slab's temperature contraction stress was established by means of orthogonal design and multivariate statistical regression.Range analysis of the calculation results ranked the factors in the order of importance as follows: temperature change, crack spacing, slab thickness, bond-slip stiffness coefficient, bar diameter and bar spacing.Through single-factor and single-variable regression analysis, the general relationship between the temperature contraction stress and each factor was determined.A fitting formula was then obtained by single-variable and multi-factor multivariate statistical regression method through the assumption and combination analysis of each variable.The formula passed the hypothesis test, and error analysis showed that its maximum error range was controlled within 8%.