Using the quantum perturbation theory and model of the multi-photon nonlinear Compton scattering，the optically controlled switching for spatial soliton in multi-channel planar waveguide system under Compton scattering is studied.The result shows that in the nonlinear planar optical waveguide with a sinusoidal modulation of the refractive index in the transverse direction，the soliton can be cut between a channel and near channel,through the pinch soliton wave beam effect in the transverse direction of the cross phase modulation between the soliton in the channel,and control optical point formed by the incident optical and scattered optical，and the function of the soliton switching is attained.The control optical point can be attained by the transverse direction focusing of the coupling optical between a potential valley and near potential valley.The threshold of the effective intensity of the control optical point and the radiation loss of the soliton can be increased by the scattered optical，the potential wall high is increased，and the littler extent is reduced.These are all beneficial to the soliton form，the wide unfolded by the scattering of the soliton wave beam is bigger，and the danger destroyed by the scattering to the soliton switching is existing too.Therefore， the control appropriate incident laser intensity is the key for the attaining soliton switching.