For negative bending moment prestressed tendons in simply supported-to-structurally-continuous bridges, the flat anchorage method of flange plate is more reasonable, but its widespread application is limited due to the anchoring capacity restrictions of flat anchor plates. To improve the anchoring capacity of a single anchorage zone, reduce the number of prestressed ducts, save concrete, and improve construction efficiency, a novel 6-hole flat anchor plate was developed, designed, and manufactured in this paper. By combining finite element analysis and experimental methods, a finite element analysis model of the concrete load transfer specimen beneath the novel 6-hole flat anchor plate was established, and its performances, including crack development, ultimate bearing capacity, stress distribution, and failure modes, were calculated and analyzed. Additionally, a cyclic loading test of the anchor plate was designed, and the load transfer performance of the novel 6-hole flat anchor plate was tested. The results indicate that under the design tension control stress, neither the anchor plate nor the steel reinforcement reaches the yield strength, and the 6-hole flat anchor plate can work stably under the design tension stress; after 10 loading cycles, the development of strain and crack width of the specimen tends to be stable, and the ultimate bearing capacity is higher than the nominal ultimate tensile force of the six prestressed tendons, indicating that the 6-hole flat anchor plate can adapt to more severe working conditions and has a higher safety margin; the cracking load and ultimate bearing capacity calculated by the finite element analysis are basically consistent with the experimental results, which demonstrates that the finite element model is reliable. The novel 6-hole flat anchor plate has excellent load transfer performance and safe stress reserves, possessing engineering application value.