The invention discloses a device for quantitatively counting body fluid, comprising a liquid receiving vessel, a liquid receiving tube and a hole enlargement part of the liquid receiving tube, wherein the liquid receiving vessel is axially connected with the hole enlargement part of the liquid receiving tube in a detachable manner; the inner cavity of the hole enlargement part of the liquid receiving tube is provided with a positive electrode and a negative electrode which are electrically connected to a binding post which is symmetrical to the outboard diameter direction of the upper part ofthe hole enlargement part of the liquid receiving tube. The invention is characterized in that the liquid receiving tube is an inverted round table structure; the pipe orifice at the lower part of the round table is communicated with the inner cavity of the hole enlargement part of the liquid receiving tube; the positive electrode and negative electrode comprise a first wire electrode and a second wire electrode which pass through the axial center line; an axial spacing is reserved between the first wire electrode and the second wire electrode, wherein the lower end of the first wire electrode is connected with the binding post outside the upper end of the hole enlargement part of the liquid receiving tube in a V-shaped manner; the upper end of the first wire electrode is provided with a liquid drop conductor which is just arranged below the pipe orifice at the lower end of the liquid receiving tube; the upper end of the second wire electrode is connected with another binding post outside the upper end of the hole enlargement part of the liquid receiving tube; and the lower end is opposite to the center of the bottom of the liquid receiving vessel.