We propose a method to intrinsically realize the nonvolatile electrical control of noncollinear antiferromagnetism, and translate our idea to concrete van der Waals $\mathrm{V}{\mathrm{I}}_2$ bilayers from the first-principles calculations. In $\mathrm{V}{\mathrm{I}}_2$ bilayer systems, we unravel that the sliding ferroelectricity couples strongly to the spin spiral chirality of each $\mathrm{V}{\mathrm{I}}_2$ monolayer, which we refer to as the spin spiral chirality–sliding ferroelectricity locking effect. In this view, a flexibly electrical switch of the noncollinear antiferromagnetism can be realized via interlayer sliding. Our work therefore opens a different direction for the study of type-II multiferroic materials in two dimensions.

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• Magnetoelectric effect
• Chiral magnets
• Multiferroics
• Noncollinear magnets