The invention discloses a coke quenching system. The coke quenching system comprises a material feeding device, a cooling device and a material discharging device, wherein the material feeding devicecomprises at least one material feeding bin valve group, each material feeding bin valve group comprises a storage bin, a herringbone material feeding pipe, two first material feeding lock hopper valves, two material feeding buffer bins and two second material feeding lock hopper valves, and a main pipe at the upper end of the herringbone material feeding pipe is connected with the bottom of the storage bin; two branch pipes at the lower end of the herringbone material feeding pipe are connected with the two first material feeding lock hopper valves in one-to-one correspondence, and the firstmaterial feeding lock hopper valves, the material feeding buffer bins and the second material feeding lock hopper valves are connected from top to bottom sequentially; the cooling device includes a first cooling unit and a second cooling unit, the two second material feeding lock hopper valves are connected with the top surface of the first cooling unit and the top surface of the second cooling unit in one-to-one correspondence, and the bottom surface of the first cooling unit and the bottom surface of the second cooling unit are connected with the material discharging device. Through the cokequenching system, the gas resistance in the heat exchange process can be reduced effectively, the floor space is small, and the amount of coke quenching treatment per unit area is large.