We have made the concrete test blocks, which were blasted by different charge quantities in the semi-infinite soil. Using the SHIMADZU Universal Testing Machine AG-X250kN system, we performed the uniaxial compression test, studied the stress-strain curves of concretes by explosion, under the same condition curing and the standard curing. The results show that, concrete will have higher compression strength by explosion. And there is an optimal charge quantity, when the concrete consumption is given. With this optimal charge quantity, compression property of concrete by explosion is superior to concrete cured at standard.