Water pretreatment method and anaerobic ammonia oxidation water treatment process

The invention provides a water pretreatment method and an anaerobic ammonia oxidation water treatment process, and the water pretreatment method comprises the following steps: obtaining the actual water quantity of the current inlet water of a water pretreatment system and a current water quality gray value representing the comprehensive water quality condition of the current inlet water; determining operation parameters of the water pretreatment system by using the actual water volume and the current water quality gray value, specifically comprising the following steps: responding to the fact that the actual water volume is greater than a first threshold value, and operating the water pretreatment system according to a first parameter; in response to determining that the actual water volume is less than the second threshold value, the water pretreatment system operates at a second parameter; in response to the fact that the actual water volume is smaller than or equal to the first threshold value and larger