Abstract: The time and space patterns of the biomass and biological productivity of corn(Zea mays) cropland in the shelterbelt network in SongNen plain and the relationship among the patterns, ecological and physiological factors in network were studied. Results showed that: The biomass and productivity in different position between the east and west belts had significient differences in each peroid in the growing season. The maximum biomass occured in 5—10 multiples of tree height(H), minimum in IH, and the biomass was also high in 25H. The level distribution of the productivity was "N" shape in most time of the growing season, two peaks occured in 10H and 25H respectively. The biomass and productivity between the south and north be Its had no difference. The patterns of the biomass and productivity in shelterbely network were restricted by the distribution of temperature and humidity in the network, and the restrict factor was different in different time. The leaf area and assimilate rate also had important effect on the pattern of productivity. The biomass of ear within network was higher than that in the open land.