An anti-injury protection device for hydraulic lifting platforms of good-lifts, air platforms and similar includes tetrahedral structures (1) that may be applied for protection of the edges of sharp boards (P) of good-lifts, air platforms and similar, from which telescopic structures (6) are projecting for the protection of the edges, and of light devices (7) which get automatically started when they get into contact with the surface of the plane to be protected; in the lower part of the structures (1), horizontally pivoted planes (4, 5) are provided, kept in resting position by magnets or other and which, once opened, add their own fluorescence to the intermittent danger light signal placed on top of the tetrahedron so as to attract and contemporarily call the attention for showing the obstacle and the dangerous area.