This paper introduces a simulation modeling method for signal processing of ship-borne phased array radar using the idea of component modeling. First, according to the function, the functional components of ship-borne phased array radar signal processing are divided. The construction method of ship-borne phased array signal processing simulation system based on C++ is introduced, which makes it reusable, reconfigurable and scalable. Then the signal level simulation of the signal processing of the ship-borne phased array radar is carried out. The accuracy of the model is verified by the accuracy analysis and performance evaluation of the simulation results. The established model provides a good foundation for the simulation and application of ship-borne phased array radar, and has certain reference significance in engineering.