Abstract: Network fraud has become the main form of crime in the current society, and has formed a complete criminal industry chain. In order to achieve the goal,the criminal suspect constantly uses all kinds of new technology,new equipment and new means of payment,whhich bring great difficulties to the case investigation.The article makes a detailed analysis of the encryption agent Internet technology,,group call technlogy and money laundering methods, and analyzes how they use technology and tools to infringe upon the people and avoid investigation.Meanwhile, it also makes a preliminary exploration on the forensic and investigation of the these new means and equipment,which plays a role in attracting valuable information. Especially for the current main application equipment GOIP of network fraud,the article makes a more detailed analysis from the perspective of network structure,equipment charctteristics and forensic analysis and so on.