The invention relates to a spicy and hot konjak instant food and a preparation method thereof. The food is composed of an instant konkak powder bag, a pickled pepper water bag and a spicy and hot seasoning bag. Instant konjak powder contains puffed konjak powder which is prepared by the steps of preprocessing, initial washing, alcohol and acid washing, backwashing, drying and puffing. According tothe spicy and hot konjak instant food, a unique preparation process is adopted by the instant konjak powder, konjak tofu like bitty cream with good elasticity, fineness and smoothness, uniform appearance and moistness without odors can be brewed rapidly by using boiled water, and the pickled pepper water and spicy and hot seasonings are added synergistically to obtain a palatable and healthy spicy-and-hot-flavour food. The konjak food has the advantages of convenient storage and eating, and the konjak food can be frequently eaten as daily food.