The present invention includes N (N = 2) small cars capable of driving in a paddy field, N elastic rods are mounted vertically on the top of N small cars, and N elastic means are mounted on N elastic rods , A small tank and a pump are installed in a small car, and the transport pipe is installed between the telescopic rods, and a plurality of nozzles are mounted to be evenly distributed over the transport pipe. The distance measuring device and the main control module are mounted on the transport pipe. The main control module discloses a precision spraying system for crops that is electrically connected to a distance measuring device and a new construction means. The present invention can secure the distance between the nozzle and the top of the crop, realize accurate spraying, no artificial maneuvering, the topography is not flat, or the type of the crop is blindly adjusted to artificially, so that redistribution or spraying is omitted. It effectively avoids, improves the drug spraying accuracy of crops, improves the uniformity of spraying, improves the pesticide utilization rate, reduces the burden of spraying large-scale farmland, and improves spraying efficiency.
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