Fecha de publicación: 07/07/2022 Fuente: Wipo "BigData" The present invention relates to a compression method for big data, characterized in that the method comprises: searching for the maximum value in a group of data of the same type in the big data, wherein the absolute value of each field in the big data is smaller than or equal to a first threshold; and, when the group of data meets a first condition, storing the group of data by a method using a variable bit length, wherein the bit length of the maximum value is used as the bit length for storage of the group of data. The present invention further relates to a compression device for big data, a computer storage medium, and a server.