BiFeO3 is a rare example of multiferroic material with a simple perovskite-like structure, having extremely large magnetic ordering temperature (TN = 650 K) and Curie temperature, characterizing onset of ferroelectricity (TC = 1100 K) values. Recently, several pressure-induced structural phase transitions were observed in BiFeO3, but crystal structure symmetry of these new phases, and detailed information about atomic coordinates, as well as evolution of magnetic order, remains unclear. In order to determine a full set of structural parameters in high-pressure phases of BiFeO3, as well as elucidate magnetic order changes, we propose to perform neutron diffraction experiments in 0 - 9 GPa pressure range with Pearl diffractometer. This information is important for understanding of coupling mechanism between magnetic and ferroelectric properties, governed by crystal structure distortion