The invention belongs to the technical field of numerical control systems, and particularly relates to a speed curve planning method for a continuous processing path, which comprises a look-ahead section and a time-sharing processing method for a fixed section length of the look-ahead section. The method comprises the following steps: 1, carrying out small-section look-ahead on the divided look-ahead section, carrying out backward recursion in sequence, carrying out forward recursion on a small-section curve to obtain a forward recursion speed, and ensuring that the forward recursion speed is less than or equal to an inflection point speed limit; and 2, backtracking the points which do not meet the forward recursion condition to obtain a backtracking speed, and when the backtracking speed is greater than the forward pushing speed, determining that the requirement is met, and ending the look-ahead of the small section. According to the method, a simplified method combining forward recursion and backtracking is adopted for speed look-ahead planning, a method of continuing backtracking is adopted when the backtracking speed is not met, and when the backtracking speed is still not met in the first section, jerk backtracking is modified, so that the problem that the backtracking speed is not met is solved, and the speed curve is more stable.