The invention discloses an online singing platform construction method based on the cloud technology to provide an online singing platform for music lovers. The platform is based on the cloud technology, a large number of music resources are stored and managed effectively by means of an HDFS, data access handling capacity is high, transparency is high, and fault tolerance is high. PB-class data are processed reliably by means of a MapReduce model, automatic parallelization is realized, load balancing is realized, and flexibility is high. Streaming media transmission is conducted through combination of an FMS streaming media server and the RTMP, the problem of transmission delay is well solved, and real-time performance of a singing system is guaranteed. Display of an environmental background is conducted with the virtual reality technology to enable a user to have an immersive feeling. The platform also has functions of song selection, singing, grading, sing recording saving and recording uploading and sharing. The online singing platform construction method has comprehensive functions.