The invention provides a conditioning and making method and a high-efficiency even drying method for a small trash fish marine product, belonging to the technical fields of food conditioning and aquatic product processing. The main process of the invention comprises the following steps of: removing three parts (fish scale, fish head and viscera) of a fresh or iced and fresh small trash fish marine product, washing the small trash fish marine product with clear water, slicing the small trash fish marine product into fish chips with the length of 6-10cm, deodorizing preprocessed fish meat for 4hours with compound rinsing fluid, then carrying out ultrasonic assisted vacuum impregnation conditioning (pickling and seasoning), secondary rinsing, draining, medium-short wave infrared drying pre-dehydrating, pulse spraying negative pressure microwave drying, packaging and sterilizing, thus the small trash fish dried fish prepared food product is obtained. The small trash fish marine product disclosed by the invention has good colour, fragrance and taste, beautiful appearance, low moisture content and complete nutrition, is a high-protein and low-fat food, is beneficial to reducing cholesterol and preventing cardiovascular and cerebrovascular diseases after being eaten for a long time, can be used for adjuvant therapy on leukaemia, stomach cancer and the like and is a high-quality leisure food for both the old and the young.