In order to meet the demand of laboratory data test and record, a scheme of portable data recorder with high precision acquisition and dual core structureS3C2440 and MC9S12XS128, combined with the open source LINUX system is proposed. The hardware includes the operating system module and data acquisition card module. The application program using the multi thread and database technology has improved the operation efficiency of software. In the data communication part, the corresponding data acquisition card driver program and the communication protocol is designed to improve the stability of the system. Experimental results show that the recorder can collect and record multichannel data in 0.08 s interval with high storage speed, and expend the storage space with the SD card and USB removable storage deviceslarge storage capacity, and the standard voltage acquisition can reach the level of 0.02, which can meet the demand of laboratory.