The invention discloses a horizontal well stage-unlimited sectional reconstruction method. The method comprises the following steps that: a, a signal receiver on a sliding sleeve sends a search signal within a set range; b, a signal projector is put into the well, when the signal projector enters into the set range, the signal projector receives the search signal and sends a control signal to the signal receiver; c, the signal receiver stimulates a power mechanism after receiving the control signal, the power mechanism pushes a piston to move upwards and open a sand blasting hole, inner and outer communicated channels of an oil pipe are opened, and under the action of the piston, a ball seat generation tube of the sliding sleeve generates a ball seat, and the first section reconstruction is implemented; d, after the first section reconstruction is finished, a ball is added to block the first section reservoir, and the inner and outer communicated channels of the oil pipe are closed; e, the steps above are repeated for orderly performing reconstruction of subsequent sections. By the horizontal well stage-unlimited sectional reconstruction method, stage difference is avoided, the number of stages of sections is not limited by the inner diameter of the well bore, and stage-unlimited large-scale sectional fracturing reconstruction can be realized.