The paper considers the oscillation of numerical solutions for two kinds of linear functional differential equations by the θ-method.Through the oscillatory equivalence,the advanced functional differential equation is transformed into the delay functional differential equation.By judging the roots of the characteristic equation,some conditions under which the numerical solution is oscillatory are obtained and it is proved that the oscillations of the analytic solutions are preserved by the numerical solutions under some conditions.Besides,for the special case of θ-method,the trapezoidal method,it is proved that the trapezoidal method can keep the oscillation property of the analytic solution without any condition.In the end,the article gives numerical experiments.