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This paper is aimed at constructing analytical solution for both linear and nonlinear time-fractional Boussinesq equations by an iterative method. By the iterative process, we can obtain the analytic solution of the fourth-order time-fractional Boussinesq equation in R, R2, and Rn, the sixth-order time-fractional Boussinesq equation, and the 2nth-order time-fractional Boussinesq equation in R. Through these examples, it shows that the method is simple and effective.