The invention relates a laboratory exhaust gas and waste liquor recycling device. The device comprises a water tank, a mechanical pump, an exhaust gas treatment tank I, an exhaust gas treatment tank II and a gas-liquid converter. The exhaust gas treatment tank I and the exhaust gas treatment tank II are arranged on the water tank and are connected with each other. The gas-liquid converter is connected with the exhaust gas treatment tank I. A liquidometer is arranged on one side of the water tank, and a water outlet is arranged on the other side of the water tank. The water outlet is connected with a water pipe through the mechanical pump. The water pipe is connected with the exhaust gas treatment tank I and the exhaust gas treatment tank II sequentially. A primary filter screen is arranged in the exhaust gas treatment tank I, and an exhaust gas inlet is arranged on one side of the exhaust gas treatment tank I. The water pipe in the exhaust gas treatment tank I is provided with a primary water sprayer. A secondary filter screen is arranged in the exhaust gas treatment tank II, an exhaust gas outlet/water inlet is arranged at the top of the exhaust gas treatment tank II, and a demounting opening is formed in the exhaust gas treatment tank II. The water pipe in the exhaust gas treatment tank II is provided with a secondary water sprayer. The laboratory exhaust gas and waste liquor recycling device has the advantages that the device is simple to mount and demount, convenient to operate and capable of treating poisonous and harmful exhaust gases generated in laboratories, especially inflammable, explosive, volatile, high-corrosive and moisture-sensitive exhaust gases and waster liquor.