Cybercrime has become one of the important risks endangering national political security, network security, social security, economic security, etc. Strengthening cybercrime governance is the bottom project of implementing the strategy of cyber power and digital China. Taking online gambling crime as the starting point, the data of online gambling crime in cities from 2008 to 2020 were extracted based on the China Judicial Documents Network, and the Spatial Dubin Model was used to test the influence and spatial effect of the internet penetration on online gambling crime. The findings are as follows: Firstly, online gambling crimes have similar spatial agglomeration characteristics to traditional contact crimes. The internet penetration not only promotes online gambling crimes, but also produces positive spatial spillover eff ects on online gambling crimes in surrounding areas. After endogeneity processing and robustness test, this conclusion is still valid. Secondly, the infl uence of internet penetration on online gambling crimes has obvious directivity: the internet penetration in developed areas has a positive spillover eff ect on online gambling crimes in less developed areas, and the internet penetration in central cities has a positive spillover eff ect on online gambling crimes in noncentral cities; The reverse is not true. Thirdly, the spatial spillover of online gambling crimes caused by Internet deepening has geographical attenuation characteristics and boundary effect. The maximum effect distance is 500km, and the attenuation boundary is 800km. The conclusions of this study provide scientifi c decision-making basis for strengthening network security supervision, implementing regional differentiated prevention and control strategies, and building a new pattern of sharing and co-governance.