The invention discloses an engine with a low-exhaust flame characteristic, and the engine with the low-exhaust flame characteristic can effectively inhibit secondary combustion. The engine with the low-exhaust flame characteristic comprises an electric exploder, an end socket, an igniter cartridge, an ignition support, a propelling agent, an explosive blocking plate, a combustion chamber, an inhibition layer, a convergence piece and a spray tube. The end socket is connected with the electric exploder and the combustion chamber through threads; the igniter cartridge is embedded into a ventilating circular ring of the ignition support; the ignition support and the explosive blocking plate conduct axial limiting on the propelling agent; the propelling agent is a smokeless modifying double-base propelling agent, the formula of the propelling agent contains sylvite, and seven inter-outer combustion tube-shaped explosive structures are freely loaded in the combustion chamber; the inhibition layer adopts sylvite as an inhibitor and epoxy resin as a base body and is formed on the inner molded surface of the convergence piece in a compression molding forming mode; and the convergence piece is in threaded connection with the combustion chamber and the spray tube. According to the engine with the low-exhaust flame characteristic, the characteristics such as the exhaust flame temperature, exhaust flame visible light and exhaust flame infrared radiation can be greatly reduced.