Using the provincial panel data of 31 provinces （municipalities and autonomous regions） from 2000 to 2015， and multiple stepwise regression and intermediary effect model，the impact of land scale management on various agricultural productive investment is estimated empirically. The results show that expansion of land scale management promotes labor-saving investment and restrains land-saving investment； after adding the control variable， the income level of farmers， the output of agricultural products per household and the irrigation area per household has a significant positive impact on labor-saving investment and land-saving investment， while the consumption level of farmers has a negative impact； non-agricultural employment is the intermediary variable of land scale management affecting agricultural productive investment，this is also true for labor-saving investment and restrains land-saving investment. Therefore，we must accelerate the marketization process of rural land circulation， promote the transfer of agricultural labor to non-agricultural industries， alleviate the obstacles of scarcity of agricultural production factors， promote agricultural efficiency and income.