The EV850-2T hand-held laser screed machine is a double-control (manual control automatic control) concrete laser leveling machine developed by our company. The main features are flexible operation, simple maintenance and light weight. It can be applied to all kinds of concrete leveling projects with or without steel mesh. Using Honda GX200 air-cooled four-stroke OHV engine with low fuel consumption and stable performance. It adopts integrated flattening head design, consisting of scraper, vibrator, vibrating plate, etc. It will integrate the flattening, vibrating and leveling multiple processes, using 4200hz high frequency vibrator to make concrete more compact and avoid The ground is empty, the lifting and cracking inequality problem, the leveling head and the fuselage do not affect each other, and the construction level can be maintained under the condition that the foundation is not flat. With imported lifting actuator, it is sensitive, accurate and long lasting. High work efficiency, daily workload is 3,500 Square meter. The laser screed machine adopts laser positioning elevation, and the flatness is good, and the ground error is within 3 mm.