The wet whole fish meal production is one of the most advanced fish meal processing technologies worldwide at present. Consisting of five major parts: production of fish meal, oil refining system, double-effect falling film concentrating system and deodorization device for environment protection, and electrical general control, it can make fish meal and fish oil of high quality out of leftovers of waste and odd substances (such as head, skin, bowel, etc.) and little rough fish which is not edible, especially out of round fish which is very resourceful, and it has great economic benefits and social benefits. The cooking machine consists of a circular outer shell which contains a steam jacket, and a strew axis which can be connected to the steam. The screw axis and helical blades are all hollow structured, connecting to the heating steam. Raw materials are heated by the steam between the screw axis and the outer shell after coming into the machine from feed inlet, and are moved slowly to the material outlet at the push of blades at the same time. The rotating speed of screw axis could be adjusted according to the condition of raw materials, and the heating time of raw materials is adjusted accordingly, assuring that raw materials are fully cooked in the cooking machine.