In this paper, with the help of symbolic computation, three types of rational solutions for the ( 2 + 1 )-dimensional modified KdV-Calogero-Bogoyavlenkskii-Schiff equation are derived. By means of the truncated Painlevé expansion, we show that the ( 2 + 1 )-dimensional modified KdV-Calogero-Bogoyavlenkskii-Schiff equation can be written as a trilinear-linear equation, from which we get explicit representation for rational solutions of the ( 2 + 1 )-dimensional modified KdV-Calogero-Bogoyavlenkskii-Schiff equation.