The invention provides an easy-to-mount scraper type flowmeter, comprising a first nut, a first limit plate, a second nut, a second limit plate and a steel rod. The steel rod is mounted at the left end of an upstream flange, and the right end of the steel rod penetrates the upstream flange, a companion flange and a downstream flange sequentially and extends to the right side of the downstream flange. The first nut is mounted at the right side of the circular side of the steel rod. The first limit plate is also mounted at the right of the circular side of the steel rod, and a first guide hole is processed at the right end face of the first limit plate. The second limit plate is mounted at the left of the circular side of the steel rod, and a second guide hole is processed at the left end face of the second limit plate. The second nut is mounted at the left side of the circular side of the steel rod. The design of the easy-to-mount scraper type flowmeter solves the problem that It is inconvenient to mount the conventional scraper type flowmeter as people had to fix the downstream flange and the upstream flange at two ends of the companion flange by multiple groups of bolts before carrying out spot welding at the joints. The scraper type flowmeter is convenient to mount, is reusable, easy to operate and high in reliability.