Abstract: In order to improve the success rate of fracturing in coalbed methane wells and master the response rule between construction pressure and fracture morphology, based on the fracturing operation curve of more than 140 coalbed gas wells, this paper analyzes and summarizes the characteristics of coal and rock fracturing, such as not obvious fracture pressure, high average construction pressure, and rising construction pressure with constant displacement in the pre-liquid stage. At the same time, the physical model experiment, G function analysis and net pressure fitting are demonstrated and studied. It is concluded that multi-crack initiation and extension are the main reasons for the above characteristics. The results showed that the fracture pressure was not obvious when the fracture was extended or increased after the fracture, and the average experimental pressure was high. The fitting analysis of G function and net pressure shows that there are multiple fractures in coal fracturing. Based on the above research, the adjustable multi-slug fracturing technology is proposed to prevent multi-fracture extension, and the construction results show that this technology can greatly improve the success rate of primary fracturing in coalbed gas wells.