Portable farmland slope measuring device

The utility model discloses a portable farmland slope measuring device. The device comprises a base, a stay bar, a light spot emitting mechanism and a light screen, wherein the lower end of the stay bar is installed on the base; the light spot emitting mechanism is installed at the upper end of the stay bar via a rotating shaft and can rotate up and down around the rotating shaft; an angle ruler is also vertically arranged at the upper end of the stay bar; a calibrated scale with marked height is also arranged on the light screen; a light spot emitted by the light spot emitting mechanism is used for hitting the calibrated scale so that the height of the light spot on the calibrated scale is consistent with that of the light spot emitting mechanism. The device has the beneficial effects that the slope of the whole slope surface can be directly measured; the measuring results are more accurate; the device is mainly used for measuring the average slope; the accuracy of measurement of the device can not be affected even if the slope surface is longer or larger heaves exist locally; if the slope of the farmland varies obviously, the slope can be measured section by section according to the practical situation.