A method for generating a coordinate point in an embedded system comprises the following steps: obtaining a random number and a first fixed value, and performing a modulo operation on the random number by using the first fixed value as a modulus, so as to obtain first data; selecting each data bit from the first data; obtaining, according to a position of the selected data bit in the first data, an initial point value corresponding to the selected data bit from a pre-stored initial point value list when data in the selected data bit is not zero; and performing a point adding operation on the obtained initial point value and an intermediate point value, and outputting the obtained operation result as result data. In the present invention, by querying in a preset initial point value list, an initial point value in the initial point value list is obtained, and calculation is performed according to the initial point value, thereby greatly improving the speed of generating a coordinate point.