This paper presents a study of air-knife which controls coating thickness in continuous galvanizing line(CGL). In the process of steel strip coating, it is necessary that the gas from air-knife nozzle impinge on moving strip with minimum pressure loss for high line speed and thin film coating. In the present study, the impinged pressure distributions on the strip are analyzed with various air-knife nozzle geometries. The lip length, angle of lip, and shape of lip are chosen as main parameters of air-knife nozzle geometries. The numerical simulations are performed using the FLUENT commercial code. The governing equations are consisted of 2-D Navier-Stokes equations and standard k- e turbulence model to solve turbulent flow field. The result obtained show that the non-rounded lip is influenced, by lip angle. However, the rounded lip is not influenced, by lip angle but lip length and radius of round.