The utility model discloses an LED driver with a DALI function. The LED driver comprises a main substrate, an electronic driver fixedly installed on the main substrate, an auxiliary substrate, a DALIlight modulation module fixedly installed on the auxiliary substrate and a splicing structure. The main substrate and the auxiliary substrate are spliced in a pluggable mode through a splicing structure, and the electronic driver is electrically connected with the DALI dimming module through the splicing structure. According to the utility model, through the splicing structure, the product is simpler in structure, can be freely combined, is convenient to disassemble and assemble, reduces the area of a single horizontal plane, and facilitates the structural design of electronic equipment.