The invention discloses a plot seeder accurate positioning and control method based on Beidou navigation. The method comprises the following steps of a) recording the coordinate of an initial point A;b) carrying out seeding work; c) determining whether Distance (A, B) is greater than or equal to L, carrying out seeding when the Distance (A, B) is greater than or equal to the L, and continuously carrying out seeding when the Distance (A, B) is not greater than or equal to the L; d) when the Distance (A, B) is greater than or equal to the L, changing seeds; e) carrying out seeding work when theDistance (A, B) is greater than or equal to L+d; and f) when the Distance(A,B) is greater than or equal to n(L+d)-d, stop seeding and changing the seeds; and reseeding when the Distance(A,B)is greater than or equal to n(L+d). By using the plot seeding control method, acquired 13-bit latitude and longitude coordinates are divided into 3 portions, single-precision floating-point-type operation is performed on each portion and positioning precision can reach a centimeter level so that the precision requirement of plot seeding is satisfied and a problem that single-precision MCU can not directlycarry out double-precision floating-point-type data operation is solved.