On the basis of analyzing ECT basic principle and imaging algorithm，based on the characteristic offilter LBP and neural network RBF，an image fusion method based on multiwavelet transform is proposed about theeffect of“soft-field" nature and ill一posed problem on thereconstructed image accuracy. This method first appliesmultiwavelet to decompose the reconstructed images，then fuses the images through the integration of low frequencycoefficients and high frequency coefficients based on fusion rules of maxinum and regional gradient. Finally，thefused image is reconstructed by multiwavelet. The simulation results show that image accuracy significantly improvedand removed redundant information after integration. This study provided a new method on ECT image reconstruction to make image closer to the prototype.