A new improvement was brought forward on algebraic reconstruction technique(ART),here,named simple self-correlative algebraic reconstruction technique(SSCART).It was used to reconstruct a field with an opaque object block in.Its reconstrucive result was discussed in detail.With numerical simulation technique,both ART and SSCART were separately used to reconstruct a model field with an opaque object block in,and discussed in simulated result and econstructive accuracy with error indexes such as mean-square error (MSE),absolute value error (AVE) and peak error (PE).As a result,both of the two techniques could properly reconstruct the model field,but the accuracy of SSCART was improved much.Its MSE was decreased twenty-six point six percent than that of ART (the diffeence between MSE of ART and that of SSCART divided by the MSE of ART) at the level of 10~ -4 magnitude,and PE seventy-seven point six percent at the level of 10~ -2 magnitude.