The invention relates to a vehicle infrastructure cooperative security communication method based on hash encryption. The method comprises the following steps: step 1), mixing connection request information and a PIN code into a secondary character string by an information sender, wherein the PIN code is a unique identification code corresponding to the information sender; step 2), performing hash encryption on the secondary character string, and generating a corresponding hash value; and step 3), maintaining a database that stores multiple hash values by an information receiver, after receiving the hash value in step 2) by the information receiver, traversing to find the database, and judging whether the received hash value is valid; if yes, then establishing a secure communication connection with the information sender; otherwise, refusing the connection. Compared with the prior art, the vehicle infrastructure cooperative security communication method based on the hash encryption provided by the invention has the advantages of being high in security, and capable of realizing access control and so on.