The invention relates to a method and device for washing cooking materials. The method includes the steps of 1, according to demands, adding the cooking materials into a container; 2, using a drivingdevice to drive a pipe, and inserting the pipe into the container, wherein the outlet of the pipe is positioned in the cooking materials and is close to the bottom of the container; 3, supplying waterto the pipe through a water system; 4, after water is introduced through the pipe for a certain time, stopping the water system from introducing water, and sucking water out of the container throughthe pipe when the water system runs again to complete washing once; 5, according to different cooking materials, selecting different washing frequencies, and repeating the step 3 and the step 4 according to the corresponding washing frequency; 6, using the driving device to drive the pipe to detach from the container to complete the whole washing process. According to the method for washing the cooking materials, damage caused by interference from external force to the cooking materials is avoided, meanwhile different washing frequencies can be selected according to different materials, the cooking materials are preserved well, and the situation that the taste after cooking is influenced since the cooking materials are damaged can be avoided.