The invention relates to the field of information security and microprocessor design, and provides an optimized automatic bilinear pairing encryption method and device based on a point blinding process aiming at increasing the computing efficiency of algorithms from the perspective of hardware implementation, further saving computing resources, fundamentally reducing the encryption and decryption time and space consumption, simultaneously using reasonable anti-attack protection measures, effectively enhancing the security of bilinear pairing encryption, and providing a possibility for replacing a current mainstream encryption system by using the bilinear pairing encryption method. The technical scheme adopted by the invention is that the optimized automatic bilinear pairing encryption method based on the point blinding process comprises two steps namely encryption and decryption, and also comprises a step that a certificate authority (CA) gives a public key Kp=sPCA and a private key dA=sIDA in advance by using the feature that a random parameter s belongs to [1, p-1] and p is a prime field which is represented by a formula, wherein PCA is a public parameter, and IDA is identity information of a user; and it is assumed that a user B encrypts a message which is represented by a formula to a user A, a formula is a bilinear pairing, and both P and Q are input formal parameters. The optimized automatic bilinear pairing encryption method and device based on the point blinding process provided by the invention are mainly applied to information security occasions.