The novel cluster-solid-core photonic crystal fiber (PCF) is proposed, which is structured by the bismuth silicate glass cores with a higher refractive index and the fused silica base with a lower refractive index. In particular, the guiding is only localized in the cluster-solid-core region by the total internal reflection (TIR). While the same power output from each solid-core in the PCF can be obtained. The nonlinearity and the mode field area of the cluster-six-core PCF and the cluster-eight-core PCF versus the pump wavelength and the core diameter are discussed by numerical simulation. The results show that the novel PCF designs have the specialities of the equivalently higher nonlinearity and the effectively large mode-field area, and can offer a significant potential in high-power frequency transform.