To alleviate shortcomings that it is difficult to obtain operation information during non duty period and the shift handover time is not enough to fully prompt risk information, a pre work risk prompt system for flight dispatch based on .NET platform is designed and implemented. Firstly, the system and networking architecture are designed. According to the architecture of the airline operation command department, the user’s permissions are divided into administrator, senior user and ordinary user, corresponding to the maintenance personnel, release main shift and seat attendant respectively. Secondly, the software requirements are analyzed. According to the actual work flow in dispatch release, it is proposed that the software should have client authentication module, information circle reading module, information query module, information input module and information audit module, and the logical relationship and specific implementation methods of these modules are described. Thirdly, through the situational awareness law of release dispatchers, an information importance ranking mechanism based on TOPSIS is established to give priority to important information. Finally, the software is implemented by C# language, and the running effect of the software is verified.