Tidal power generation is a new type of energy developed in recent years. It has the advantages of simple structure, reliable and stable operation and renewable energy. In this paper, the tidal effect in ocean engineering is analyzed and studied. After introducing the theoretical knowledge of waves, a complete mathematical model system of waves is proposed based on the kinetic energy theorem. Then use the kinetic energy theorem performance calculation method to solve the formula to obtain the sea water density function expression, and use the simulation result curve to calculate the number of fan revolutions and the corresponding coefficient distribution parameter values under different types. The model test results show that the tidal power generation model based on the performance calculation method of kinetic energy theorem has excellent detection time, compatibility of more than 90%, and high accuracy.