Dichlorvos light contact poisoning has pupil narrowing, bradycardia, fever, muscle tremor, lacrimation, respiratory and eye symptoms appear relatively early, oral poisoning often occurs in the gastrointestinal symptoms, skin contact poisoning so local sweating and adjacent muscle fiber contraction as the initial performance. Dichlorvos and skin contact, more erythema-like changes, gradually into blisters. The time and severity of organophosphorus pesticide poisoning symptoms appear with the route of entry, the nature of the pesticide, wet rales and croup, chills, etc., and should be treated immediately with hospital detoxification. Moderately severe poisoning can have small hormonal tremors that can progress to the extremities and trunk, and in severe cases, muscle weakness or even respiratory paralysis can occur. The central nervous system symptoms are mainly dizziness, weakness, and in severe cases, confusion or even coma, paroxysmal convulsions, and in severe cases, cerebral edema or central respiratory failure until death.