The joint case handling of economic investigation and criminal investigation refers to the joint case handling of economic investigation and criminal investigation. When dealing with economic crimes and criminal crimes, public security organs take the method of combining economic investigation with criminal investigation to crack down on criminal acts. The combination of economic investigation and criminal investigation can improve the efficiency of handling cases, better protect the legitimate rights and interests of victims, and better safeguard social stability and economic development. Therefore, the joint case of economic investigation and criminal investigation is a joint case of economic investigation and criminal investigation.