The invention provides a novel check valve. The novel check valve comprises a shell (1) and is characterized in that corresponding cooperative supporting bodies (2) are arranged at the two ends of theshell (1), a mandrel (3) is arranged between the two supporting bodies (2) in a penetrating manner, a spring (4) sleeves the mandrel (3), and a valve block (5) corresponding to and cooperating with the shell (1) further sleeves the part, on one side of the spring (4), of the mandrel (3). According to the novel check valve, the structure is simple, the use is convenient, safety and reliability areachieved, the stability is high, the practicability is good, the situation that the reverse flow of water occurs in a circulating water pipeline of a float glass production line and then a water pumpand a motor are impacted is effectively avoided, and the service lives of the water pump and the motor are prolonged.