In order to solve the problem of aero-engine fuel measurement in transient state, the dynamic flow measurement technology of aero-fuel flow based on laminar flow meter (LFM) was studied. A liquid LFM with a range of 0~ 3 000 mL/ min was designed. The LFM was tested on a small turbojet-engine test bench and compared with a coriolis mass flowmeter (CMF). The test results show that the LFM has excellent dynamic characteristics. When the engine is in a steady state, the LFM measurement results are in good agreement with those of the CMF, and the relative error is -1. 25% ~ 1. 16% , which is consistent with the relative error of -1. 24% ~ 1. 26% when the LFM is calibrated. When the engine is in a transition state, the liquid LFM can follow the oil pressure after pump well, while the CMF cannot follow the oil pressure after the pump and there is a lag of about 2 s. The measurement result of the LFM can be consistent with the control logic during starting and acceleration / deceleration. The study in this paper provides valuable references for the research of aero-engine test technology and the expansion of LFM applications.