The invention provides an electric car frame structure for distributed installation of battery packs. The electric car frame structure comprises a framework type car frame, a block-based battery pack structure, a sealing board and a floor, wherein the framework type car frame comprises a front car beam (1), a rear car beam (2), a conical multi-cell thin-wall pipe structure (3) and a threshold structure (4); the front car beam (1) is located at the front end of the framework type car frame, the rear car beam (2) is located at the rear portion of the framework type car frame, the front car beam (1) and the rear car beam (2) are connected through longitudinal energy absorption structures on the left side and the right side in an orthometric energy absorption structure (7), and the threshold structure (4) and the orthometric energy absorption structure (7) are in transitional connection through the conical multi-cell thin-wall pipe structure. The implementation mode is easy, convenient and fast, the number of parts is decreased, the utilization rate of materials is improved, the manufacturing process of the integrated structure is simplified, the structure lightweight design is achieved, and meanwhile the crash safety performance is improved to a great extent.