The utility model provides a simple structure, low cost's drive axle guide flows board for water conservancy diversion structure under the replacement engine on the backplate realizes platform design and development on mating with the different motorcycle types of money engine, solve the hot problem of management of general leading forerunner, final vacuum motorcycle type gum cover position in the drive shaft moves the festival. The utility model discloses a drive axle guide flows board comprises in the turn -ups of guide plate main part both sides the guide plate main part at middle part and vertical bit, the guide plate main part is by the air inlet direction to air -out direction kickup gradually, the turn -ups is equipped with the mounting hole that is used for fixed drive axle guide flows board. Above -mentioned drive axle guide flows board installs in the below of engine oil drain pan, with a wind channel of oil pan combination formation. " the cold wind " of fan insufflates from the guide plate air intake, and the process wind channel is followed the air outlet and is upwards blown to gum cover position in the drive shaft removal festival, has effectively improved flow field here, reaches the purpose of the all ring edge borders of reduction temperature.