The invention discloses a lens with the wide light emitting range and a lamp. The lens comprises a first cylinder lens body, a cone frustum lens body and a second cylinder lens body which are arranged and integrally formed from bottom to top. A first arc outer convex lens body is integrally formed on the upper end face of the second cylinder lens body. A cone frustum notch is formed in the first cylinder lens body and the cone frustum lens body. A second arc outer convex lens body is integrally formed on the part, at the position of the upper end face of the cone frustum notch, of the cone frustum lens body. Providing the lens used for the LED lamp to overcome the defects in the prior art is one purpose, and providing the lamp which adopts the above lens and is good in heat dissipation effect and long in service life is the other purpose.