Angle ruler used for crop lodging measurement

The utility model discloses an angle ruler used for field crop lodging research. The angle ruler used for the crop lodging measurement is structurally characterized in that the angle ruler is mainly composed of four parts, namely a static ruler, a moving ruler, a connecting ruler and a fixed sleeve; the static ruler is provided with length scales, can directly measure the canopy height of a crop colony and serves as a reference object in the crop lodging angle measurement; the connecting ruler is provided with a V-shaped groove in the long shaft direction, the upper half part of the connecting ruler is provided with angle values in a range of 0-90 degrees, and an angle which is formed between the static ruler and the moving ruler by the moving ruler sliding along the V-shaped groove of the connecting ruler is used to measure a crop colony stalk lodging angle. The angle ruler can be used individually or used in combination with a crop lodging-resistant intensity determinator to realize the measurement of the crop colony canopy height, the field crop lodging angle and the crop stalk lodging angle in a crop lodging-resistant intensity determination process.