The invention discloses a scheduling transmission method for collaborative cells against cell edge users of a downlink. Under the transmission method provided by the invention, adjacent two base stations can collaboratively schedule the respective transmission based on an alternating data sharing protocol in which a signal space diversity technology is embedded, thereby enabling each base station to alternately perform data transmission and keep silence. Based on the realizable packet alternating data sharing way provided by the invention, inter-cell space diversity can be exploited and utilized in the form of the signal space diversity under the situation of local channel state information (CSI), thereby reducing the error probability of each data stream and further enabling an inter-cell link to turn from being harmful to being beneficial. By adopting the inter-cell collaborative scheduling scheme provided by the invention, the BER (bit error rate) performance of the two collaborative cells on the data downlink within a signal to noise ratio interval of actual work can be greatly upgraded.