This paper tells some experimental results of remote sensing estimation of winter wheat yield under the condition of controlable sample fields. The controlable sample field means that winter wheat was grown on a cement pool with 3.25 meters long

2.37 meters wide and 2.00 meters in depth to enlarge the span of yield by controling fertilizer and watering. During the growing season necessary agronomic parameters

such as LAI

the ear number

average grain number and the grain weight

etc.

were measured

at the same time we measured spectral parameters. Based on finding the relationship between spectral parameters of different stages and three basic factors which form winter wheat yield an integral formular for remote sensing winter wheat yield estimation was found. An analysis and discusion was made for the principal of remote sensing estimation of winter wheat yield.