The invention discloses a wind power output reconstruction method based on wind process division. The method comprises the following steps: acquiring a wind power output time series, storing the sameas a historical wind power time series and filtering the same; dividing the wind power time series into segments and a wind process; transferring the wind process to be a Markov random process, distributing randomly the segments within the wind process, and determining a wind process transfer probability and a segment probability distribution; selecting the wind process and the internal segments of the wind process at random by a sequential sampling technique to obtain a simulated wind power output contour; determining the simulation error of the simulated wind power output contour; and addingthe simulation error to the wind power output contour to obtain a simulated wind power output time series. According to the new method for constructing a future wind power output scenario, the simulated wind power output time series obtained by the method can be used for research in power system planning, reliability assessment of wind power capacity, reliability assessment of power system with wind power, and wind power reception capacity assessment of the system.