The invention discloses a 110 KV transformer protection constant value query method and relates to the technical field of power transformer parameter query. The method comprises the steps as follows: calculating a 110 KV transformer protection constant value; 2) recording the calculated 110 KV transformer protection constant value in a database and establishing a 110 KV transformer protection constant value query library; 3) establishing a query interface and setting query conditions; 4) inputting the query conditions for query of the transformer protection constant value. The110 KV transformer protection constant value is calculated in advance, the calculated 110 KV transformer protection constant value is recorded in the database, and meanwhile, the query interface is established. When query of the 110 KV transformer protection constant value is needed, query is clicked after the corresponding query conditions are input in the query interface, corresponding110 KV transformer protection constant value content can appear, with the adoption of the manner, query of the110 KV transformer protection constant value is more rapid and simpler, a non-professional person can perform query, and the working efficiency of an electric power worker can be improved.