Fertilizing device based on soil environment

The invention relates to the technical field of soil fertilization, in particular to a soil environment-based fertilization device, which comprises a fertilization vehicle, a soil sampling mechanism, a soil nitrogen phosphorus and potassium sensor, a control assembly, a conveying assembly and a collection box, the soil sampling mechanism, the control assembly, the conveying assembly and the collecting box are all mounted on the tumbril, and the soil sampling mechanism comprises a soil sampling assembly and a conveying assembly; the conveying assembly comprises a plurality of fertilizer supply boxes and a plurality of conveying pipes; the soil nitrogen-phosphorus-potassium sensor is installed in the collecting box, the control assembly comprises a processor and a plurality of first electromagnetic valves, the soil nitrogen-phosphorus-potassium sensor and the first electromagnetic valves are electrically connected with the processor, and the content of nutrients needed by crop growth and the flow of the fertili