Abstract: Abstract: This paper conducts a simulation study on ecosystem evolution of cross-border innovation alliance using a symbiosis evolution model, through which the symbiotic evolution equilibrium and its stability conditions is analyzed and different symbiotic evolution mode is studied by computer simulation. Furthermore，Beijing Innovation Alliance is taken as an example for an empirical analysis. The results show that: (1) the evolution results of cross-border innovation alliance ecosystem depend on the sum of symbiosis coefficient; (2) when all the symbiosis coefficients are negative, the ecosystem belongs to the mutualism evolution. (3) When the sum of symbiosis coefficients of any two cross-border innovators are positive (negative), and the sum of symbiosis coefficients of another cross-border innovator is negative (positive), the ecosystem belongs to the parasitic symbiosis evolution (4) When the sum of symbiosis coefficients of any two cross-border innovators are negative (zero), and the sum of symbiosis coefficients of another cross-border innovator is zero (negative), the ecosystem belongs to the partial symbiosis evolution. The research provides theoretical support and related institutional advices for promoting the development of the cross-border innovation alliance ecosystem along reciprocal symbiosis evolution. Keyword: cross-border innovation alliance; ecosystem; symbiosis evolution model; empirical research

Key words: cross-boundary innovation alliance, ecosystem, symbiosis evolution model