Design method for guaranteeing back drilling precision of LED lamp panel

The invention discloses a design method for guaranteeing the back drilling precision of an LED lamp panel. The design method sequentially comprises the following working procedures of cutting, drying a board, processing an inner-layer circuit, pressing for fitting, carrying out primary drilling, carrying out chemical copper deposition, electroplating a whole board, processing an outer-layer circuit, electroplating a pattern, drilling a standby positioning hole, carrying out back drilling, carrying out alkaline etching, carrying out solder mask processing, processing characters, forming, carrying out an electrical test and carrying out finished product inspection, wherein when the inner layer circuit is manufactured, a corresponding circuit is optically drawn on a film, a set of standby target holes are additionally arranged, the film is static for 4 hours in the environment with the temperature being 20-24 DEG C and the humidity being 50%-55%, the overall expansion and contraction of the film are controlled w