Abstract: Pseudo emulsion flow is a new flow phenomenon of oil and gas gathering and transferring. Comparing the fluidity with normal mixture of oil, gas and water, it may greatly decrease the pipe stream resistance and partial resistance, and raise the efficiency of pumping well. We do a lot of experiments at different density of flow improver to get the flow resistance of pumping unit tube valve and pumping unit pillar fill valve, and find the affection of flow improver concentration on flow resistance.