The invention discloses a low-pulsation gear flowmeter of a composite gear type, which is formed by enabling 2 shafts to respectively support a composite gear comprising gears 6, 7 and 8 and a composite gear comprising gears 17, 16 and 15. Each composite gear can comprise 2-4 gears axially mounted and peripherally staggered. A composite gear comprising three gears is used for explanation. Liquid to be measured enters an oil feeding cavity of the flowmeter from an oil feeding hole of the flowmeter and pushes the mutually engaged gears to rotate so that oil liquid is driven to an oil discharge cavity of the gears and is discharged from an oil discharge hole of the flowmeter, and a flow signal of the liquid to be measured is converted into a rotating speed signal of the shaft 1; then, the rotating speed signal is converted into an electric signal by an angle coder mounted on the shaft 1 to confirm the dynamic flow of a system to be measured; the mutually engaged gears, the shaft 1 and a shaft 2 can be made of light wear-resistant materials and have small rotational inertia; the number of the gears is a multiple of an integer not equal to 3, and the flow can realize staggered superposition. The flowmeter has extremely little flow pulsation, obviously improves the flow quality, belongs to a volume-type flowmeter to avoid the influence of test environmental conditions, accurately measures the dynamic flow of the high pressure of a hydraulic system, has the advantages of wide measurinog range, high precision, good reliability, and the like and can be widely applied to the flow measurement of the high-pressure hydraulic system of industries, such as aerospace, military industry, chemical industry, coal mine, metallurgy, and the like.