A　protocol　to　generate　atomic　singlet　state　of　three　atoms　is　proposed.　The　strong　Rydberg　interactions　between　atoms　mediate　the　multi-qubit　operations　and　help　to　simplify　the　dynamics　of　the　system.　The　effective　Hamiltonian　is　constructed　in　the　regime　of　Rydberg　blockade　and　the　evolution　path　is　built　up　from　an　initial　state　to　the　target　singlet　state　via　the　Lie-transform-based　pulse　design.　Numerical　simulations　show　the　protocol　can　produce　atomic　singlet　state　with　high　fidelity　and　holds　robustness　against　several　types　of　experimental　imperfections.　Therefore,　it　may　provide　some　useful　results　for　the　generation　of　singlet　states　in　atomic　system.