A kind of low cost and environmental protection ultra-high performance concrete (UHPC) was prepared. According to the modified Andreasen and Andersen model, the mix proportion design was carried out. Using waste incineration slag instead of the river sand to prepare different replacement rates of UHPC, and the working performance, mechanical properties, pore characteristics, hydration process, microscopic characteristics and toxic consolidation performance were tested. The results show that with the addition of garbage residue, the working performance and compressive strength of UHPC decrease， but the fluidity is no less than 240 mm and the compressive strength is no less than 117 MPa. The cumulative pore content increases, most of the pores are distributed in the harmless pore range of <20 nm, and the cracks in the transition zone of concrete interface increase.The concentration of Zn, Pb and Cr in concrete are all lower than the limit value of national standard, which achieves effective consolidation of heavy metals.