The utility model discloses a multi -functional environmental protection bicycle lamp, solar cell panel sets up the upper surface at the casing, the solar cell expansion board is equipped with two, sets up respectively in the left and right sides of solar cell board, the battery is installed in the inside left side of casing, the setting of LED lamp is openly middle the casing, night light lamp switching system is in the middle of the right side surface of casing, LED lamp switching system is in the below of night light lamp switch, the fixation clamp is equipped with two sets ofly, and every group is two, and sets up respectively in the left and right sides of casing bottom, the double -screw bolt is equipped with two, and every passes every group fixation clamp respectively, the night light lamp is equipped with two, and sets up respectively in digital clock and power display's below, the USB interface sets up the top at the night light lamp switch. This bicycle lamp is energy -concerving and environment -protective for a bicycle lamp, has better illuminating effect, has promoted the security of cycling trip, and solar cell panel's setting is energy -concerving and environment -protective.