1. A quick response (QR) code feature detection method, characterized by comprising: presetting a threshold of the number of rows, and dividing a received QR code image into a multi-row image of rows of pixels whose number is the same as the threshold of the number of rows; calculating an average grayscale value of each column of pixels in the multi-row image to form row data; binarizing the row data; counting the number of consecutive “1” and the number of consecutive “0” in the binarized row data to form row proportions; presetting a row proportion threshold, and extracting a rectangle image corresponding to a row proportion whose similarity to a preset proportion is smaller than the row proportion threshold from the row proportions; presetting a width threshold, and binarizing the rectangle image and a region formed by extending the rectangle image by the width threshold upwardly and downwardly respectively; searching for column line segments meeting the preset proportion on a middle column of the rectangle image; translating a diagonal line of a square image containing the rectangle image and the column line segments in upward and downward directions respectively; searching for and recording black-white demarcation points on the edge of the square image on the translated diagonal line; and connecting the black-white demarcation points to form a position detection pattern of the QR code.