Crop 3D modeling is a key problem of agricultural informationization.Crop 3D information collection and reconstruction is the hotspot.Methods of crop 3D information collection and reconstruction were classified according to the principle and operation mode.The basic principle and application of each method was presented and discussed.The problems of the accuracy of crop 3D modeling were divided into two classes and introduced respectively.Finally,the prospect of crop 3D information collection and reconstruction based on the measured data was discussed from four aspects including the methods fusion,the multi-parameter inversion,the operating mode and the scope of work.