A multifunctional mine safety cap comprises a safety cap casing with a brim, and a safety cap inner edge arranged at a lower part of an inner side of the safety cap casing; wherein, two sides of the safety cap casing are symmetrically provided with a safety cap tying belt; the safety cap casing is provided with a mine lamp fixing frame used for placing a mine lamp; the safety cap casing is also provided with a protecting mask, the protecting mask is hinged to the safety cap casing through a protecting mask tying belt and bolts, the protecting mask is provided with an oxygen generator; the inner side of the safety cap casing is symmetrically provided with dustproof earmuffs, a middle part of the each dustproof earmuff is provided with a hole used for wrapping an ear of a human body, and a periphery of the dustproof earmuff is provided with a rope used for controlling degree of tightness. The multifunctional mine safety cap of the utility model has the beneficial effects that: by organically combining the safety cap, the protecting mask, the oxygen generator and the dustproof earmuffs together, the multifunctional mine safety cap can be used and operated simply and conveniently; oxygen generated by the oxygen generator can provide valuable time for emergency rescue; the earmuffs can prevent dust from entering into the ears, thereby raising working comfort level of a miner, ensuring personal safety of the coal miner, and achieving the purpose of multi-function.