As a new means of simulation, the infrared simulation is widely used in the military field for its high simulation credibility, good repeatability and low testing cost. To satisfy the requirements for infrared simulation system and to adjust the energy proportion of short-medium wave bands，we develop the filters. Using Ge and SiO as coating materials because of the absorption characteristic of Ge in the visible and near-infrared wave band, superimposing two film stacks to broaden the reflection band, we design and optimize a two-band energy regulation and wide band cut filter by using variable metric method of TFCalc software. According to the characteristics of different materials, we make the corresponding filter by using electron beam evaporation and resistance deposition techniques. By using reverse engineering method, we analyze the effect of extinction coefficient on transmittance and solve the problem of low transmittance. Transmittance of the filter is less than 1% at 300 nm to 1900 nm and 5500 nm to 7500 nm, 90.6% at 2000 nm to 2500 nm, and 35.7% at 3700 nm to 4800 nm, which meets environmental testing requirements of the simulation system.