Solid booster rocket engine

The invention discloses a solid booster rocket engine which comprises a front shell and a rear shell, wherein the rear shell is provided with a spray pipe and an igniter, a front powder stop plate is arranged at the front part of the front shell, a rear powder stop plate is arranged close to the igniter in the rear shell, and propellants are arranged between the front powder stop plate and the rear powder stop plate. The solid booster rocket engine is applied in multiple products, multiple tests including cast simulation are performed, the tests all achieve a complete success, throughput, thrust, internal trajectory and the like all meet requirements, the rear powder stop plate is firm, and no ejecta exists. The solid booster rocket engine is simple in structure, reasonable in design and high in reliability, and has practical value.