Light　guide　plate　(LGP)　plays　an　irreplaceable　role　in　backlight　module　of　liquid　crystal　display　(LCD)　systems.　Based　on　interactive　design　of　Gtools　and　Tracepro,　we　propose　an　effective　design　method　of　scattering　dots　array　for　LCD　backlight　in　this　paper.　This　method　first　initializes　the　scale　of　the　scattering　dots　in　Gtools,　then　evaluates　illumination　distribution　in　Tracepro,　and　finally　determines　the　array　layout　of　the　scattering　dots　from　the　interactive　optimization　between　Gtools　and　Tracepro.　This　method　can　flexibly　adjust　the　light　emission　in　each　sub-area　of　the　LGP,　which　has　scientific　significance　and　practical　value　in　some　ways.