The invention discloses a fermented crocodile fish ball with mushroom and a preparation method of the fermented crocodile fish ball with the mushroom, and belongs to the field of meat product processing. The fermented crocodile fish ball with the mushroom is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of crocodile meat, 8-10 parts of mushroom powder, 2-4 parts of corn starch, 10-14 parts of egg white, 0.6-0.9 part of table salt, 1.6-2.4 parts of ginger juice, 2.5-3.5 parts of spring onion juice, 0.15-0.25 part of white granulated sugar, 0.15-0.25 part of aginomoto, 1-2 parts of a leavening agent and a proper amount of ice water. The fermented crocodile fish ball with the mushroom is prepared by the steps of pickling, chopping, pelleting, fermenting, boiling and cooling. With the crocodile meat as a main raw material, the fermented crocodile fish ball with the mushroom is abundant in nutrient, convenient to eat and easy to store; direct vat complex bifidobacterium, lactobacillus bulgaricus and streptococcus thermophilus leavening agents are selected in the processing process; the effects of producing acid and inhibiting bacteria can be achieved; and the product is unique in flavor.