For the distributed small wind farms, an improved reduced matrix converter (RMC) structure is proposed. Its features are that the connection of directly-driven permanent synchronous generators (PMSG) are DC parallel and DC-DC structure with high frequency transformer is used to rise the DC bus voltage. The use of DC parallel reduces the randomness and volatility of wind power and has the smaller impact on the power grid voltage and the frequency. While the DC-DC boost structure replaces converter station, it is more suitable for distributed small wind farm. To effectively implement the generators to separate or parallel power grid, this paper designs the instantaneous sampling of the wind generator voltage to judge whether it is connected to the DC bus. The simulation models of a set of PMSG, PWM rectifier, circuit breaker and DC-DC with high frequency transformer are established based on Matlab/Simulink simulation platform. The simulation analyses that 1 or 2 generators separate or parallel DC bus and voltage boost in the case of the bus having 2, 5 or 8 generators are carried out. The simulation results show that the proposed model can achieve 1 or 2 wind generators to separate or parallel DC bus and voltage boost under ideal conditions, and it has a better effect when 7 generators run. This work is supported by National Natural Science Foundation of China (No. 51667020 and No. 51367015) and Research Fund for the Doctoral Program of Higher Education of China (No. 20136501120003).