The invention discloses a UDP (User Datagram Protocol) load balancing method, a UDP load balancing device and a UDP load balancing system, the method comprises the following steps: receiving a requestof a client side, and judging whether the request is a UDP request; when the request is determined to be the UDP request, reading a background server list which is preconfigured by a Nginx server andrecords information of a background server and a UDP identifier, and distributing the UDP request to the background server according to a preset distribution policy. A load balancing scheme, based onthe Nginx and provided by the invention, can satisfy requirements of a high concurrency and high UDP request scene, also can be expanded horizontally, is convenient for improving performance, moreover, as compared with a hardware solution, the loading balancing scheme is low-cost.