scene capture2d depth not capture translucent?

I tryed scenedepth in A,and in General show Flags translucency is turn on,but depth map don’t have translucent model.

Translucency is calculated in a different pass from opaque objects, so it won’t show up in your depth map. The only way to make your translucent objects have depth calculation is through a workaround that is, for instance, discussed here;