  We study propagation of the Gaussian beam of spin waves and its reflection
from the edge of thin yttrium-iron-garnet film with in-plane magnetization
perpendicular to this edge. We have performed micromagnetic simulations
supported by analytical calculations to investigate influence of the surface
magnetic anisotropy present at the film edge on the reflection, especially in
the context of the Goos-Hanchen effect. We have shown the appearance of a
negative lateral shift between reflected and incident spin wave beams' spots.
This shift is particularly sensitive to the surface magnetic anisotropy value
and is a result of the Goos-Hanchen shift which is sensitive to the magnitude
of the anisotropy and of the bending of spin wave beam. We have demonstrated
that the demagnetizing field provide graded increase of the refractive index
for spin waves, which is responsible for the bending.
