The present disclosure discloses a liquid crystal display and a compensation data storage method thereof, the storage method includes: capturing the target compensation data of the display area; determining the data precision corresponding to the target compensation data according to the data range of the target compensation data; adjusting the target compensation data in accordance with the data precision to obtain the storage compensation data of the data range that can be stored in accordance with the preset storage space; storing the storage compensation data and the data precision. In this manner, the present disclosure can improve the accuracy of the mura compensation data and the data signal can be effectively compensated to reduce the mura condition of the panel.