The invention relates to the field of manufacturing of diamond saw blade matrixes and in particular relates to a saw blade matrix pressure quenching device and a quenching process thereof. The device comprises a hydraulic oil cylinder, a hydraulic control loop system, a hydraulic oil cylinder and upper pressing plate connecting device, a saw blade matrix, a hydraulic oil tank, an upper fixing rack, a guide post, an upper pressing plate, a lower pressing plate, a quenching oil control loop system and a quenching oil tank, wherein the upper pressing plate is in a vertical movable type and can move up and down under driving of the hydraulic oil cylinder; during quenching, the saw blade matrix is arranged on the lower pressing plate, the upper pressing plate is pressed downwards and presses the matrix in the up-down manner by means of a correction pressure block, the spread oil cooling is performed, and the press tempering is performed after the cooling. When the saw blade matrix is subjected to quenching treatment, so that the hardness can be guaranteed, the deformation of the saw blade matrix can be controlled, the production cost is controlled, the production efficiency is improved, and the saw blade matrix pressure quenching device is suitable for quenching various sheets of the saw blade matrix and suitable for large-scale automatic production.