A lens mold comprises a first pressing portion, a second pressing portion, and a shaping portion disposed between the two, which comprises an upper slide and a lower slide. The upper slide and the lower slide are connected to the second pressing portion, and can slide along each other. A mold cavity in fluidic communication with a flow path and the inlet such that the lens material flows from the inlet to the mold cavity along the flow path to form a shaped lens. After the lens is formed, the upper slide and the lower slide away from each other separately, where a part of the shaped lens is remains in a recess defined in the second pressing portion, to help release the shaped lens from the mold.