Multiline bSSFP is an acceleration technique that has the potential to approach the speed of EPI while overcoming inherent EPI artifacts in fMRI. However, the highly segmented EPI readout in multiline bSSFP can cause severe Nyquist artifacts. Additionally, extra magnitude and phase differences among the echoes also exist within the echo train, making it more complicated. In this study, a joint-GRAPPA based 2D phase correction method is proposed, which can robustly correct artifacts in multi-echo bSSFP with different ETLs while maintaining the image SNR. To evaluate its performance, this approach is also compared to other parallel imaging based correction methods.