The homogeneity principle requires that the electron wave function must satisfy the condition of exchange antisymmetry. In view of its influence on the transient absorption spectrum of multi-electron system, the helium atom wave function with identical anti-symmetry is obtained by Ritz variational method. On this basis, the transient absorption spectra of attosecond extreme ultraviolet (XUV) light of helium atoms are studied theoretically by solving the three energy level model and comparing with the old model without considering electron exchange. This study breaks through the traditional single-electron transition model and focuses on the effect of electron exchange on the transient absorption spectrum of XUV light. It is found that the exchange interaction has an important influence on the physical quantities, such as the intensity of the transient absorption spectrum and the position of the absorption peak. The results can provide a reference for using transient absorption spectrum to detect the ultrafast correlation dynamics of electrons in atoms.