The invention relates to the technical field of curved surface LEDs, and specifically relates to a preparation method of a novel WiFi intelligent control type curved surface LED display device. The preparation method comprises the following specific steps: S1, determining a project product to be of a separated module structure, and carrying out system structure design on an LED module; S2, carrying out circuit design on an infrared module, a WIFI module and an LED module; S3, after mold processing is completed, preparing a shell piece through an injection molding process; S4, carrying out SMTtechnology assembly on an LED lamp panel and a main control panel; and S5, researching and determining an assembly technology, and carrying out integral assembling on each component. A white LED lampbead is taken as a light source, multi-colored display is realized by printing different colors of printing inks on a diaphragm, and voltage difference among different colors of lamp beads is solved perfectly. A display module (integrated infrared module), a main control module and a WIFI module are separated, the interference among different signals during integration on the same PCB is reduced,and simultaneously, the exchange of each functional module is facilitated.