The invention discloses a flexible test platform for an avionic system and avionic integration and verification methods. The integration method comprises the step of incremental-type system integration on the basis of simulation, and the verification method comprises the steps: excitation-response verification and dynamic integrated verification. The platform comprises a general control system (101), an avionic simulation system (102), a configuration intelligent control system (109), a rotary table (114), an electromechanical signal simulation system (103), a real cabinet system (108), a atmospheric excitation system (113), a data acquisition system (104), a virtual cabin/test cabin system (108), an electromechanical MIniRIG (112), a radio excitation system (111), a visual system (105), aflight simulation system (106) and a power system (110). According to the invention, the platform and methods can solve problems of integration and verification of large-scale avionic systems, improve the integration efficiency, reduce the manpower and time cost, improve the verification comprehensiveness and accuracy, and achieve the intelligent and automatic test.