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The recent emergence of two-dimensional (2D) van der Waals ferromagnets has provided a new platform for exploring magnetism in the flatland and for designing 2D ferromagnet-based spintronics devices. Despite intensive studies, the anomalous Hall effect (AHE) mechanisms in 2D van der Waals ferromagnets have not been investigated yet. In this talk, I will present the AHE mechanisms in quasi-2D van der Waals ferromagnet Fe_0.29TaS₂ via systematically measuring Fe_0.29TaS₂ devices with thickness from 14 nm to bulk single crystal. The dominant AHE mechanism is found to be skew scattering in bulk single crystal, and the contribution from intrinsic mechanism emerges and become more relevant as the Fe_0.29TaS₂ thickness decrease. Besides, the coercive field in Fe_0.29TaS₂ thin flake decrease as the Fe_0.29TaS₂ thickness decrease.