The utility model discloses a road emulsified asphalt preparation facilities, including biological pitch preparation storehouse, to the emulsification soap lye that living beings heavy oil and methyl alcohol mix and the heating goes on preparing with the living beings heavy oil improvement storehouse of going on living beings heavy oil improveing, to the emulsification soap lye prepare the storehouse and with biological pitch and emulsification soap lye homogeneous mixing is in order to carry out emulsive biological pitch emulsification device to biological pitch, living beings heavy oil improvement storehouse is supported in biological pitch preparation storehouse top, biological pitch emulsification device includes emulsification chamber, feeding chamber and constructs the biological pitch of emulsification intracavity and the garrulous mill that the emulsification soap lye stirred and the bits of broken glass is ground, the discharge gate in biological pitch preparation storehouse passes through pitch conveyer pipe and feeding chamber intercommunication, and the liquid outlet that the storehouse was prepared to the emulsification soap lye passes through soap lye conveyer pipe and feeding chamber intercommunication. The utility model has the advantages of simple structure and reasonable design and use easy and simple to handle, excellent in use effect, can accomplish emulsified asphalt's preparation process portably, fast to the preparation process is easily controlled.