This article conducts an in-depth study on the Hopf bifurcation caused by parameter changes in fractional order van der Pol Rayleigh systems under the condition of primary resonance. Firstly, for the fractional order nonlinear vibration system, the approximate analytical solution of the system was calculated using the multiscale method and the comparison coefficient method. By separating its real and imaginary parts through mathematical processing, the analytical expression of the amplitude frequency relationship of the system under the main resonance condition was obtained, laying a theoretical foundation for subsequent stability analysis. Secondly, based on the first Lyapunov exponent and Jacobian matrix eigenvalue analysis method, the stability conditions of the system were systematically explored, and the position of the Hopf bifurcation point was accurately calculated according to the solution results of its characteristic equation, determining the critical parameter values for periodic oscillation of the system. Then, through the theoretical analysis of static bifurcation, the types and dynamic characteristics of Hopf bifurcation were discussed in depth, revealing the topological evolution law of the system during parameter changes. Finally, a comprehensive analysis of the amplitude frequency response curve was conducted through detailed numerical simulations, effectively verifying the correctness and applicability of the analytical theory derivation. With the help of various visualization methods such as bifurcation diagrams, phase diagrams, and time series diagrams, the impact of different parameter changes on Hopf bifurcation was analyzed in depth, providing important theoretical references and numerical basis for the dynamic behavior prediction and parameter optimization design of fractional order nonlinear systems.