Data calling method and system, dual-chip point-of-sale terminal and readable storage medium

The invention is suitable for the technical field of point-of-sale terminals, and provides a data calling method which comprises the steps of: enabling a security chip to receive a calling command sent by an application chip, wherein the calling command comprises a function name and parameters of a target calling function; and analyzing the call command to obtain a function name included in the call command, performing system call through the target call function to obtain a call result, and feeding back the call result to the application chip. According to the method, system calling is carried out in the target function according to the calling instruction carrying the function name of the target function, so that the application chip can directly obtain the data calling result of the security chip, cross-chip system calling is realized, and the data processing efficiency of the system is improved. 本申请适用于销售终端技术领域，提供了一种数据调用方法，包括：安全芯片接收应用芯片发送的调用命令，调用命令包括目标调用函数的函数名和参数。解析调用命令，获得调用命令中包括的函数名，通过目标调用函数进行系统调用，获得调用结果，