Quantum anomalous layer Hall effect in the topological magnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>MnBi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Te</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math>

Recently, a type of Hall effect due to an unusual layer-locked Berry curvature called the layer (LHE) has been reported in even-layered two-dimensional antiferromagnetic (AFM) MnBi2Te4 [A. Gao et.al, Nature 595, 521 (2021)]. In this work, we report that quantization LHE, which call quantum anomalous (QALHE), can be realized MnBi2Te4. The QALHE originates from kicking Berry-curvature monopole out Fermi sea by vertielectric cal field. Remarkably, demonstrate electric-field reversal switch sign quantized conductance AFM phase. also ferromagnetic These results provide promising way toward electric engineering monopoles and quantized-layered transport topological magnets.