The invention belongs to the field of biological signal and intelligent processing, and particularly relates to an electrocardiosignal preanalysis method. The method particularly comprises the steps that an R wave is detected out from electrocardiosignal data subjected to filtering processing through a threshold value algorithm based on a window, and heart rate variability analysis is conducted; the processed data is displayed on a customized control, an R point is marked, a QRS point is marked, and parameters are calculated; screening is conducted on electrocardiogram data collected from patients, waveforms with good quality are stored, transmission of the electrocardiogram data with poor waveform quality between doctors and the patients is reduced, the electrocardiogram data serves as a coordinating center between the patients and the doctors, a basis is provided for follow-up diagnosis of doctors, and the data with good waveform quality is sent to a doctor side through social software finally. The electrocardiosignal preanalysis method has the advantages that implementation is easy, the calculation amount is small, the result is visual and convenient to check, screening can be effectively conducted on the electrocardiosignal data collected by the patients, and transmission of the electrocardiogram data with the poor waveform quality between doctors and the patients is reduced.