The position of the point detector is one of the important parameters for the optical sectioning of the dual-axes confocal microscopy,so the point detector should be correctly positioned on the axis and without defocus. The effect of the point detector position in dual-axes confocal microscopy is analyzed. The results show that the slight axial offset of the point detector brings few effects on the axial intensity response,and a slight transverse offset of the point detector can introduce a shift into the axial response curve,while the main lobe of the axial response curve in shape is almost invariant,and the shift in the axis z increases as the offset increases.