A reading lamp, by which, the limitation of illuminated and magnified zones of a known flat-panel reading lamp is overcome. The reading lamp does not need to be manually moved many times in use, so that it is convenient to carry and easy for operation. The reading lamp includes a splicable optical module and a luminous module, wherein, the splicable optical module includes a plurality of light guiding plates, at one face of each of which, there is provided a Fresnel thread, and at another face of each of which, there are arranged optical lattice points with uneven density; the plurality of light guiding plates can be spliced with each other; a light exiting end of the luminous module is connected to an upper end of the splicable optical module.