The broadband all-angle super collimation dispersion properties of two-dimensional (2D) elliptical photonic crystal structures with two-fold rotational symmetry and its applications in power splitters are studied. Its dispersion relation is calculated by the plane wave expand method. The calculated results show that there exist straight-like equi-frequency lines spanning over the whole first Brillouin zone within a relative broad band for TE polarization. These straight-like equi-frequency lines are used to realize broadband all-angle super collimation transmission. Based on the above results, one kind of Y-shape power splitter is designed. Finite-difference Timedomain simulations reveal that this Y-shape splitter has good performance for 2D point source and Gaussian source. The above results have great potential in photonic devices integration and directional coupling.