Abstract: With acceleration of agricultural modernization in China, precision agriculture has put higher requirements on soil nutrient detection accuracy and efficiency．Against this backdrop, soil available silicon, as one of key nutritional elements affecting crop growth, requires accurate determination for scientific fertilization and to improve crop yield and quality．Current methods for detecting soil available silicon are plagued by cumbersome operations, time-consuming processes, and high costs, making it difficult to apply for large-scale farmland monitoring．To addresses above issues by comprehensively applying inductively coupled plasma optical emission spectrometry（ICP-OES）and silicon molybdenum blue spectrophotometry method．Comparative analysis, condition optimization, and standardized procedures construction were done, to improve soil available silicon detection efficiency and accuracy．Research focuses on soil sample pretreatment technique improvement, detection parameters' precise control, and comparative verification between methods to ensure rresults' eliability and comparability．Through experimental design and data analysis, operational processes of two detection methods were optimized, a standardized detection system was established, significantly improving detection efficiency and reducing costs．