A first aid kit for vehicle, comprising a first aid kit body, and the first aid kit body is internally provided with a portable respirator, oxygen inhalation goggles, a floating rope, a first aid bracelet, a military shovel, cut-resistant gloves, a multifunctional tool bag and a medical supply bag, wherein the portable respirator comprises a main valve body and a gas cylinder; a pressure relief diaphragm is mounted inside the main valve body; an outer side of the pressure relief diaphragm is in communication with the atmospheric environment and an inner side of the pressure relief diaphragm forms a low-pressure compartment with an inner wall of the main valve body; the low-pressure compartment is in communication with a gas outlet of a gas outlet end of the gas cylinder through an inlet gas channel; a pressure relief valve is disposed inside the main valve body; a pressure relief channel in communication with the inlet gas channel and the low-pressure compartment is disposed in a valve body of the pressure relief valve; a pressure relief opening is disposed on the valve body of the pressure relief valve; the pressure relief diaphragm is linked with the pressure relief valve through a pressing mechanism; the main valve body is provided with an inflation opening in communication with the inlet gas channel and the main valve body is provided with a mouthpiece interface in communication with the low-pressure compartment; an exhaust opening in communication with the low-pressure compartment is disposed at the bottom of the main valve body, and the exhaust opening is provided with a one-way exhaust diaphragm; the oxygen inhalation goggles comprise a goggle frame fitted with lenses and a flexible skirt edge disposed around the goggle frame to form a respiratory chamber; an inlet gas tube is inserted into the flexible skirt edge; one end of the inlet gas tube communicates with the respiratory chamber and extends to a nose part, and the end is provided with nose plugs for ease of inhalation; the other end of the inlet gas tube is connected with a portable oxygen cylinder; the goggle frame is provided with a binding strap fixed to a head part, and the binding strap is provided with an elastic strap for detachably mounting the portable oxygen cylinder to the binding strap. the portable respirator comprises a main valve body and a gas cylinder; a pressure relief diaphragm is mounted inside the main valve body; an outer side of the pressure relief diaphragm is in communication with the atmospheric environment and an inner side of the pressure relief diaphragm forms a low-pressure compartment with an inner wall of the main valve body; the low-pressure compartment is in communication with a gas outlet of a gas outlet end of the gas cylinder through an inlet gas channel; a pressure relief valve is disposed inside the main valve body; a pressure relief channel in communication with the inlet gas channel and the low-pressure compartment is disposed in a valve body of the pressure relief valve; a pressure relief opening is disposed on the valve body of the pressure relief valve; the pressure relief diaphragm is linked with the pressure relief valve through a pressing mechanism; the main valve body is provided with an inflation opening in communication with the inlet gas channel and the main valve body is provided with a mouthpiece interface in communication with the low-pressure compartment; an exhaust opening in communication with the low-pressure compartment is disposed at the bottom of the main valve body, and the exhaust opening is provided with a one-way exhaust diaphragm; the oxygen inhalation goggles comprise a goggle frame fitted with lenses and a flexible skirt edge disposed around the goggle frame to form a respiratory chamber; an inlet gas tube is inserted into the flexible skirt edge; one end of the inlet gas tube communicates with the respiratory chamber and extends to a nose part, and the end is provided with nose plugs for ease of inhalation; the other end of the inlet gas tube is connected with a portable oxygen cylinder; the goggle frame is provided with a binding strap fixed to a head part, and the binding strap is provided with an elastic strap for detachably mounting the portable oxygen cylinder to the binding strap.