Abstract: As neoclassical input\|output model combined with space effect， spatial econometrics method was used to study spatial correlation and measure output elasticity of agricultural production in Beijing and Tianjins 22 counties. Then regional difference in agricultural technology was decomposed. Result showed that agricultural production performed local accumulation in spatial distribution and positive spatial lag effect. Labor and capital was determinant factor in agricultural production， while lands contribution was not significant. For total regional differences， agricultural technology discrepancy was mainly reflected within region， but not among different regions. Considering similarity and interaction in agricultural production activities around neighborhood， spatial interaction needs to be considered in policy setting.

Key words: agriculture production function, spatial econometric model, factor output elasticity, regional difference