The invention relates to a lens, a backlight module and display equipment, and belongs to the technical field of backlight sources. The lens is provided with an inner cavity; fluorescent powder is used for filling the inner cavity, is suffered from exciting light of a light source to emit light, and is equivalent to a scattering light source; and the fluorescent powder is used for filling the lens to greatly increase the light emitting angle of the lens so as to prevent bad visual effect of nonuniform lightness. In addition, the width change of the inner cavity in the light radiation direction of the light source is opposite to the light intensity change of a light distribution curve of the light source, so that more fluorescent powder is in an area with lower light intensity of light emitted by the light source, and the light intensity of the excited light is improved; and less fluorescent powder is in an area with higher light intensity of the light emitted by the light source, so that the light intensity of the excited light is reduced, the energy of the light emitted by the lens from each angle is kept consistent, and the uniformity of the light emitted by the lens is guaranteed.