In recent years, heterogeneous multi-core processors have gradually become the mainstream in the mobile computing environment. Compared with the traditional processor design, they can meet the computing needs of devices at a lower power cost. Microarchitecture differences between the CPU cores also pose new challenges for some basic methods in the operating systems. In this study, in order to resolve the load balancing problem of heterogeneous scheduling, a new load balancing mechanism called S-Bridge is proposed, which reduces the influence of the processor microarchitecture and the task requirement diversity. The main contribution of S-Bridge is to provide a universal, heterogeneity-aware load balancing interface, so that any scheduler can easily adapt to the heterogeneous multi-core processor systems. The experiments based on CFS and HMP on the X86 and ARM platforms show that S-Bridge can be implemented on different platforms with different kernel versions. The average performance increases by more than 15%, and in some best cases 65% is achieved.