High-precision micro liquid equivalent flow distributor

The present invention discloses a liquid flow distributor, and particularly relates to a high-precision micro liquid equivalent flow distributor. The flow distributor comprises a cover sheet and a substrate. The cover sheet is provided with a sample feeding hole; and the substrate is provided with an arc liquid channel that communicates with the sample feeding hole and a sample outlet that communicates with the liquid channel. The flow distributor is characterized in that the liquid channel is subjected to surface hydrophlic modification; circular liquid storage tanks of which the sizes are sequentially reduced in the flowing direction of liquid are connected to the liquid channel; various sections, which communicate with the liquid storage tank, the sample feeding hole and the sample outlet, of the liquid channel extend in a tangential line direction of the circular liquid storage tanks; and connected-in points and connected-out points of the liquid channels and the circular liquid storage tanks are located on top edges of the liquid storage tanks and are distributed symmetrically. According to the high-precision micro liquid equivalent flow distributor provided by the present invention, by means of hydrophlic modification of a surface material and negative pressure effects of the sequentially reduced liquid storage tanks, accurate and rapid equivalent flow distribution and transport control among multiple liquid sample adding channels are realized. during repeated experiments, on the basis of an automated platform, limitations such as repeatability and precision of manual sample adding are overcome, and the flow distributor has significant practice value.