Abstract: Changqing Oilfield is rich in tight oil resources. Drilling of horizontal well and volume-fracturing process are the main methods for development. Volume-fracturing tools hold the key to development process. Based on the analysis comparison of the pipe string and support tools used for staged renovation of horizontal wells in the previous stage and combined with the requirements on the tools for volume-fracturing process and cluster perforation, this paper briefs about hydro-jetting cluster-perforating volume-fracturing tools, large-bore and fast-drilling bridge plug fracturing tools and switchable fracturing sliding sleeve tools with casing. The results indicate that hydro-jetting cluster-perforating tools are advantageous for their simple use and low operating cost under the conditions that 139.7 casing is used for cementation and completion and the pumping rate is less than 8m3/min. Therefore, hydro-jetting cluster-perforating tools become the main volume-fracturing tools for volume-fracturing of horizontal wells in Changqing Oilfield. a total of 505 horizontal wells have been fractured by means of these tools. When the pumping rate exceeds 8m3/min, large-bore and fast-drilling bridge plug fracturing tools are used because no drilling is needed after fractured and the wells can be directly put into production. A total of 42 horizontal wells have been fractured by means of such tools. Switchable fracturing sliding sleeve tool with casing, the most potential for development, can not only meet the need for large-rate fracturing renovation but also the need for later-on layered testing, water plugging and repeated renovations, indicating the development orientation for volume-fracturing tools.