Abstract: Based on survey data of 124 onion growers in Zhangqiu District, Jinan City, Shandong Province, an integrated model of technology adoption, moderating variables and high-quality development was constructed, to explore impact mechanism of green production technology adoption on Zhangqiu onion's high-quality development and test moderating effects of operating scale and human capital．Results showed that green production technology adoption significantly promoted Zhangqiu onion's high-quality development．Operating scale had a negative moderating effect on impact of green production technology, with scale expansion leading to diminishing marginal benefits．Human capital had a positive moderating effect on impact of green production technology．Among control variables, risk preference and irrigation conditions had a significant positive impacts on high-quality development, while age and cooperative participation exhibited negative effects．Based on these findings, it was suggested to build a trinity promotion system integrating demonstration-training-subsidy, implement differentiated scale operation management policies, and strengthen human capital cultivation mechanism．