Abstract: In order to explore effective means of hydraulic fracturing radius, small-scale coal and rock apparent resistivity response experiments in hydraulic fracturing process are carried out. Firstly, the apparent resistivity response of hydraulic fracturing process is analyzed, then apparent resistivity response of hydraulic fracturing experimental system is established, on this basis, characteristics of coal and rock apparent resistivity response of hydraulic fracturing are studied. It shows that apparent resistivity in coal and rock is changed due to the pressure of the water involved in the destruction of rock and coal itself can cause changes in the internal structure of the current state of the field distribution; good apparent resistivity response could be found in coal and rock hydraulic fracturing experiments, apparent resistivity of areas that affected by coal and rock hydraulic fracturing appears significantly smaller phenomenon; apparent resistivity distribution in space is not uniform, the apparent resistivity response of the sample at different positions on the time evolution is not synchronized, and apparent resistivity response is closely related with the distribution and evolution of coal and rock internal fissures and pressure of the water.