Aiming at the problem of centrifugation that the interface boundary of residue in fracturing fluid was not clear and the clear fluid could not be pour out completely， a microfiltration filtration method was proposed to measure the residue of broken-gel fluid. The residue particle size of guar gum and polymer broken-gel fluid was analyzed by laser particle size analyzer and the pore size of microfiltration membrane was determined. The influence of sample volume，temperature and pressure on flux of microfiltration membrane was researched. Finally， the effect of centrifugation and filtration method for detecting the residue in broken-gel fluid was compared. The experiment results showed that the detection temperature of filtration method was 30℃. The suitable residue filtration condition of broken-gel fluid for guar gum fracturing fluid was obtained as follows：3 μm pore size of microfiltration membrane， 0.2—0.3 MPa operating pressure， 25 and 50 mL sample volume for guar gum and modified guar gum respectively. And that for polymer fracturing fluid was obtained as follows：0.22 μm pore size of microfiltration membrane， 0.1 MPa operating pressure，150 mL sample volume. The residue was completely separated from broken-gel fluid by microfiltration membrane filtration method whose reproducibility and accuracy were better than those of centrifugation method.