In the present study, we analyze the irregular scattering(IS)of triple electrons in chaotic lithium atom by using classical method. The IS region of triple electrons is characterized by a very narrow window of two dimensionless parameters. The survival probability of the triple electrons in the IS region for the triangle configuration would decay as a function of a regularization time. It was demonstrated that the survival probability of triple electrons(TESP)decays follow an algebraic law P(τ)~τ-α with a decay exponent α_TE = 2.02. In addition, the survival probability of double electrons (DESP)decays follow an algebraic law either, the DESP decay exponent α_DE = 0.78. The decay law for the DESP could be interpreted by a long-lived Kepler orbit formed by outer electron with the atomic kernel. Whereas the explain of the decay law for the TESP is a challenging problem. It was revealed that the typical long-lived trajectory of the triple-electrons in the IS region is composed by two prominent Kepler orbits. Further, a configurations-independent property of the algebraic decay law was studied via the T-shape of triple-electron system. This configuration memory loss may be related to the resonance of triple electrons in the IS region.